Slime Castle: Idle TD RTS Game
Defend the kingdom from mobs!
How much does Slime Castle: Idle TD RTS Game cost?
Prices are current as of 28 Sept 2026.
10 one-time purchases from $2.49
In the United States, Slime Castle: Idle TD RTS Game has 10 one-time purchases priced $2.49 – 24.99.
| Product | Price |
|---|---|
| Ch.1 Pack | $2.49 |
| Newbie Pack | $3.79 |
| Ch.2 Pack | $3.90 |
| Mining Slime Special Offer | $4.99 |
| 5x Speed | $6.29 |
| Seven-day Special Event | $6.29 |
| Premium Pass | $12.49 |
| Remove Ads | $16.49 |
| Electric Slime Special Offer | $24.99 |
| Ultimate Pass | $24.99 |
See what Slime Castle: Idle TD RTS Game costs in all 173 countries →
10+ alternatives to Slime Castle: Idle TD RTS Game
| Slime Castle: Idle TD RTS Game |   Lucky Defense! |   Legend of Mushroom |   Boom Castle: Tower Defense TD |   Hex Warriors |   Cat Hero : Idle RPG |   The Demonized: Idle RPG |   Slime Weapon Master |   Smithing Master |   Bounty Bash: Idle Pirate RPG |   Lootfiend: Idle Dungeons | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Rating / 5 | 4.8 | 4.5 | 4.6 | 4.7 | 3.8 | 4.5 | 4.8 | 4.8 | 4.7 | 4.8 | 4.8 |
| Reviews | 34K | 133K | 47K | 46K | 19K | 15K | 15K | 14K | 11K | 10K | 10K |
| Released | 2024 | 2024 | 2024 | 2024 | 2024 | 2023 | 2024 | 2023 | 2023 | 2024 | 2025 |
| One-time price | $6.29 | $6.99 | $9.99 | $4.99 | $9.99 | $2.29 | $7.49 | $4.99 | $9.99 | $9.99 | $9.99 |
The going rate for each plan in United States, in its own currency, shaded from the cheapest price on the row to the dearest.
Slime Castle: Idle TD RTS Game reviews
4.8 out of 5, based on 34,122 reviews.
What people like
- Unique idle mechanics feel rewarding
- Optional ads give nice bonuses
- Surprisingly deep strategy for a mobile game
What they complain about
- Paywalls make it impossible to progress
- Difficulty spikes make late game unplayable
- Ads interrupt your gameplay constantly
- Game bugs delete your free rewards
Not a player friendly game
If you expect to get anywhere and have fun you will pay money and lots of it.. the devs don’t care about the players as recently shown with the 2nd annual celebration. What they did was add more opportunities to buy more of their nonsense. Mind you, when you buy, you’ll need to keep buying. You will get No where quickly. I’ve stuck this stupid game out for over a year just to see me wait 24 hours to do anything exponential for my account and even longer to do anything worth while for my account…. Meaning.. I’d you plan to stick with this game and spend thousands of dollars, you will see some growth quickly… if you play this game because you think it might be fun for free with free ads, you are sorely mistaken…. Expect to start doing the same stupid nonsense for years with little reward to see little growth… take it for what I say but I’ve been doing the grind and I’ve keep getting shown that all the devs care about is tricking you into buying more… eventually this game will burn out.. I personally have seen hundreds leave to what I’m explaining now… good luck, enjoy your few months, don’t buy anything and see how quickly you decide NO. But stuff and see how quickly you decide never again… only time will tell.. good luck
Dragon Orb hoard glitching
I can’t find anywhere to report issues but the stupid orb drop will seize up with a connection symbol every other drop and will cause the ball to drop too late.
Fun game. They won’t fix bugs quickly.
Currently in the game, there is a bug that took away our free keys every day you get one elite key and one artifact key but there’s a bug and it won’t let you have them and they won’t fix it if you send them a message but if you leave a review, they’ll read it be upset and they’ll probably fix it in a few months But it’s rather annoying not getting your free keys
Was fun
If you don’t spend money your not going to get anywhere
It’s alright as a passive time passer.
I like playing after work to pass the time but it’s pretty pay to win based.
I’m gonna sound like a shill but the ads are worth it
Now I never and I mean NEVER would say this without genuinely meaning it but this is the most surprisingly decent in-game ad system I’ve ever encountered in a mobile game. And this is coming from me, frontline soldier on the anti-ad war. Every single ad is optional. I’m certain if I wanted to I could just not see ads, but this is the only game I’ve ever tried (and I’ve tried so many lately as I’ve been recovering from surgery so my mobility has been limited the past couple months) where it feels genuinely worth it to click the ad button and then do something else for the next minute while leaving my phone muted and then when I pick it up again I’ve got a nice amount of rewards I can use to upgrade my stats or gear or what have you. The game is fun and it feels like I’m making good progress consistently (we will see how this holds up over an extended period ofc, as I’ve only been playing for a couple days). The idle rewards building up even while playing is ingenious. The different mini game things are cute (I particularly like the gigas battles now that I’ve got some power in my slime). I was surprised by the slime town thingy and it’s piqued my interest enough to try to save materials for it. Unlocking my dragon skill was also a fun surprise. This isn’t one of those gacha games where when you start they give you one of the current “best” characters or whatever to try and make newbies feel like they’re reaching longtime player level, but I think that’s for the best here. I only have two slimes right now and it doesn’t feel like I’m missing out. I don’t feel like I’m underpowered and I’m excited to eventually get more of them. The ONLY thing I would want to add, and this is purely a personal idea, is the ability to have your own sort of “player slime”. Maybe not one that can be used in the battles so it doesn’t overshadow the character slimes, but one that represents you and can be customized with different colors and accessories. That would be really neat but that’s again a personal preference cuz I’m a big fan of customizable characters haha. Genuinely would recommend. I hope the devs are having fun with it.
Don’t buy ad skip
I paid for the unlimited ad skip and found out it was only for 30 days and a friend just told me is is permanent for him. And through research learned that the permanent pass is server based. The game started to purposely funnel new players into a subscription based reward system 100% do not recommend this game as predatory practices
Glitch
When I leave a stage it just says No in app purchases so I say ok then 2 seconds later it says the same thing over and over again so I have to reload the game devs please fix this issue I love this game so that’s why I’m rating this 4 star instead of 5
Too hard
Have had this game for a few months. It was very fun at first but it quickly became way too hard and tedious. Some of the events are ok except the mine one, that is way too slow.
Good game, but…
I’ll admit, after a while the gameplay gets stale. I tried redownloading the game cuz i missed it, and i cant even get pass 40% on the loading screen whenever i boot up the game
Unique Gameplay.
This game is one of a kind, it offers unique gameplay, has leaderboards, and it doesn’t have forced ads. (though I can’t seem to get some things for the event to unlock an SSS slime) It lets you level up skills and slimes then start the match over being stronger. You can also unlock things in slime village to become stronger. (If you can’t get into the game at some point then try restarting your phone)
Rebalance = Nerf of paid items
The “rebalance” in the newest update completely destroyed the game, weakening everyone significantly, including enemies, but somehow leaving everyone in a net-worse position, including those that paid for items or slimes. It’s common in games like this to release new content that is suspiciously-hard without some new pack they conveniently launch at the same time, but actively making existing content worse is beyond the pale. I’m done. They’re not getting another dollar from me.
Limit on reward videos
Remarkably odd that I can’t use reward videos hardly at all. There seems to be a limit on them and then I’m stuck waiting all the time for them. Not cool. Never seen this in a game of this type before, maybe you should enact a prestige system if you’re worried about running out of game content. Other than that the game is great. Shouldn’t you have a system that lets players get video rewards all the time so you make more money? No options available for app support on this game. Too bad, so much potential…
Game deteriorates with time
Was a fun game at first. However, with more time spent it is clearly a cash grab with little attention or care from the dev team. General suggestions and reports are unanswered. Would recommend saving your time and money before playing unless you enjoy outdated features and pure luck on most events.
Needs little more work
You need a little more work fatty As mommy Reese’s pieces your mommy Jesus
It’s good
I like it
The new update
It’s not that good anymore we wasted everything we had and everything gone with the new update not playing it anymore
Fun game to play once a day
I’m really enjoying this game. Lots to do, even tho I would love more to do.. maybe some coop. The upgrade system and balancing is fair plus the idle rewards are quite generous so you can grow without even grinding. The shop prices tho are ludacris!! $35 for ONE slime? Veinly is fair and $1 and I’d happily pay $5 for the other slimes
Nice
Needs more elaborate explosions and deaths of bosses
The tower
This game is literally the exact same as the tower the only difference is how it looks but I like the tower so 3 stars
Grade
I love the game it’s cool but please make the speed go to x4 and the powers charge faster/love:Enmanuel Inoa
STOP CHANGING THE LAYOUT
Devs PLEASE STOP CHANGING THE HOME PAGE LAYOUT. Every time it changes important/frequently visited tabs are in a completely different spot for no apparent reason. If these changes made sense from a UX/UI standpoint I would understand, but seriously flip flopping everything around is serving no purpose. Things aren’t easy to find. The grouping of items doesn’t make more intuitive sense. Please just stop. 😩
LOVE THIS!
There’s no adds unless you make yourself do it but anyway there’s to much spending your money on stuff we need less money stuff it’s such a time killer I would recommend this
Ad factory
Welcome to Slime Castle! Where you’re locked to certain slimes otherwise you’re being hounded for $35 CAD (talk about greedy) which does in fact influence your game. Unless you’re spending money or watching ads to use keys you’ve earned then it’s not worth the grind.
Was Great Game
It was 5 stars until last update, the update itself was good and added stuff, but they broke the ads collection of epics and artifacts.. which is even worse when paid for add removal
Thank you
My main thing was free to play mainly because I cannot afford to spend money but this game offered me something other games couldn’t fun and free and no pay walls… the music on the main menu I don’t understand why but it’s giving me sad yet happy nostalgic feeling like I’m remember past times I miss so much in my life as if to remember chapters of my life I only dream of being able to enjoy and live again I know my review may not mean anything to anyone else but as a active guy who’s getting older and seeing how I’m not as active in a sense as I used to be this game the music has some how given me some peace that’s it’s ok that I’m getting older so thank you
Not Good
It’s done terribly
Pretty fun game
Entertaining and well designed
Fun but if you change devices or delete app then all your data is deleted
They really need to implement a better saving method to accounts because on an iphone there is zero way to save it if you happen to delete the app or switch devices
Its okay but
Its not that good tbh where are the drops?! Why did it not save? Like bro
Neat
The game is pretty cool, it has a surprising amount of depth. The only thing I don’t care for is the constant spit sound the slime makes. I wish there was a different sound to make it
Good until its not
It was a great game. Such a cash grab game
Battle pass rewards?
So up until level 14 of the battle pass I had to manually receive my rewards once I hit a new level. But since then it says I have reached 31 in the battle pass, but haven't received any of my rewards for 15-31 levels in the battle pass. I'm a free player but it's unfair on free players if we don't get our rewards for hours of farming. Please fix this. I love this game too it's brilliant just battlepas need fixing. Not sure if others are having this issue
Not what the add showed
It’s a fun game but why can’t you just show adds showing the actual game I would’ve played it seeing the real add rather than being bated, again it’s fun but getting bated to play it isn’t fun
Funny advert
Just makes me chuckle, when I see this advert pop up! You should make “I’m gonna report you!” A catch phrase so hilarious I have heard this remark so many times online, even used it myself in the past lol. The voice actor you choose, spot on, nerdy and whingy of the right amount Oh and the game is ok I suppose..
Favorite Mobile Game
I downloaded it thinking that I’d delete it in a few days. I’ve been playing for a few months and I still love it. Great game !!
Removed a paid permanent upgrade
I bought a permanent upgrade and then in a later update they changed the system the upgrade was attached to and turn the permanent upgrade into a single month subscription There are an obscene amount of 7-28day subscriptions that just want to suck every last dollar out of people they can
Great game so far, but…
Just got to 7th area. The “chef” guys are completely unkillable for me, I’ve tried resetting and closing the gaming. Nothing is working. I haven’t been able to progress for days.
About to give up
The gameplay itself is fine, but unless you like grinding the same level 100 times before even unlocking other basic game mechanics you have to pay… BEFORE EVEN GETTING TO THE FULL GAME Not worth your time. Their response is avoiding the main statement. Gg devs, gg
Good early on, bad at level 7
At level 7, expect to spends days just to progress slowly. A bit too steep and makes it boring.
Lootgirls4$$$
First pop up to buy something. Normally it’s what .99 or 1.99. Na this time first time is 24.99. Greedy humans. Then this Ads are 112 seconds long. Multi ads all kinds of revenue and you still charge insane amount of money for trash mobile game. We pay big but for console or pc gaming not mobile.
Garbage
If I could zero stars looked like a cool as game I download it I start the game once it loads and puts me on the screen just kicks me out every time so I didn’t even get to play the game don’t even waste your time
Fun game. Only one issue I’ve had
Fun game. But Fountain of Prayer doesn’t seem to do anything at all. A shame cause it was a grind to get there. The grind isn’t to bad if you’re patient with the idle rewards!
You Hit a Wall, Fun Ends
The game honestly takes a big difficulty spike around world 7, but it’s doable if you watch the ads or pay money. Problem is around World 9, even if you pay money it’s basically useless. All the upgrades are maxed out and you’re just letting Dead Hit do the work for you because even upgraded with Mythic Gear and Level 150 slimes it’s just impossible to do real damage. HP and Shields max out, no way to improve them, and yet the incoming damage is just too much. 100% unplayable. Was really fun but this is just ridiculous. Upgrades need to go higher. Also it takes 4 hours of idle rewards to even get one upgrade, when I probably need 50 more upgrades to damage to even put a dent in these things. The idle gold scaling has made even spending $13 useless. I get that maybe the developers thought no one would play this much or get this far, but it’s a slap in the face. I used to log in every day, had 3 months streak, now I do it maybe once a week because there’s no real point. I can’t advance even if I tried my heart out.
Tablet Resolution
The latest update in September, that added “tablet resolution” is terrible. Everything is now super-zoomed in and it feels like you cannot see anything on your screen. Other than this, it’s a great game so far and has been an enjoyable “down time” for me to keep up with
P2w
Can you just make less p2w
Every update adds a cash grab.
Every new “minigame” or change to an existing “minigame” is just a push to make you pay more. This game is full of greedy developers trying to get you to either watch a ridiculous amount of adds or make you pay. Very sad to see this happen. It had great potential. Can’t believe it’s taking this turn. All their mini games are RNG now as well. No skill involved. Horrible updates.
Castle défense but no story
Good game, no muss or fuss.
Fun but loses steam
The game is really fun but becomes impossible after a while. Most of the stats max out and the 6th and 7th stage become impossible to beat without grinding for months.
okay game
the game is alright but theres not much content and the content that is there is just repeated with different reskins, for example the enemies, they are all the same with different colour schemes. i would recommend the game if you're looking for something to compete in against a friend/family member.
Slime Castle: Idle TD RTS Game price by country
A one-time purchase costs $0.99 in Georgia and $14.99 in Bahrain — 15× more for the same thing. Below is the going rate for each plan in every country that sells it — the middle price of what the app charges there, in the country's own currency with the dollar equivalent beneath it.
| Country | Weekly | One-time |
|---|---|---|
| Afghanistan | — | $9.99 |
| Albania | — | $3.99 |
| Algeria | — | $9.99 |
| Angola | — | $9.99 |
| Anguilla | — | $9.99 |
| Antigua And Barbuda | — | $9.99 |
| Argentina | — | $4.99 |
| Armenia | — | $5.99 |
| Australia | — | A$7.99$5.63 |
| Austria | — | €2.99$3.41 |
| Azerbaijan | — | $3.99 |
| Bahamas | — | $4.99 |
| Bahrain | $29.99 | $14.99 |
| Barbados | — | $3.99 |
| Belarus | — | $1.99 |
| Belgium | — | €4.99$5.68 |
| Belize | — | $9.99 |
| Benin | — | $11.99 |
| Bermuda | — | $9.99 |
| Bhutan | — | $9.99 |
| Bolivia | — | $4.99 |
| Bosnia & Herzegovina | — | €9.99$11.38 |
| Botswana | — | $9.99 |
| Brazil | — | R$29.90$5.85 |
| British Virgin Islands | — | $9.99 |
| Brunei Darussalam | — | $4.99 |
| Bulgaria | — | €5.99$6.82 |
| Burkina Faso | — | $9.99 |
| Cambodia | — | $4.99 |
| Cameroon | — | $11.99 |
| Canada | — | CA$6.99$4.96 |
| Cape Verde | — | $9.99 |
| Cayman Islands | — | $9.99 |
| Chad | — | $9.99 |
| Chile | — | CLP 2,990$3.10 |
| Colombia | — | COP 14,900$4.57 |
| Congo | — | $11.99 |
| Congo, Democratic Republic | — | $9.99 |
| Costa Rica | — | $4.99 |
| Cote Divoire | — | $11.99 |
| Croatia | — | €2.99$3.41 |
| Cyprus | €29.99$34.16 | €9.99$11.38 |
| Czech Republic | — | CZK 39.00$1.82 |
| Denmark | — | DKK 39.00$6.07 |
| Dominica | — | $9.99 |
| Dominican Republic | — | $2.99 |
| Ecuador | — | $2.99 |
| Egypt | EGP 1,299.99$25.12 | EGP 499.99$9.66 |
| El Salvador | — | $2.99 |
| Estonia | — | €2.99$3.41 |
| Fiji | — | $9.99 |
| Finland | — | €2.99$3.41 |
| France | — | €5.99$6.95 |
| Gabon | — | $9.99 |
| Gambia | — | $9.99 |
| Georgia | — | $0.99 |
| Germany | — | €3.99$4.63 |
| Ghana | — | $11.99 |
| Greece | — | €5.99$6.82 |
| Grenada | — | $9.99 |
| Guatemala | — | $4.99 |
| Guinea-bissau | — | $9.99 |
| Guyana | — | $9.99 |
| Honduras | — | $4.99 |
| Hong Kong | — | HK$38.00$4.85 |
| Hungary | — | HUF 499$1.56 |
| Iceland | — | $5.99 |
| India | — | ₹999.00$10.42 |
| Indonesia | — | IDR 39,000$2.20 |
| Iraq | — | $9.99 |
| Ireland | — | €2.99$3.41 |
| Israel | — | ₪12.90$4.24 |
| Italy | — | €2.99$3.41 |
| Jamaica | — | $4.99 |
| Japan | — | ¥500$3.18 |
| Jordan | — | $4.99 |
| Kazakhstan | — | KZT 2,990.00$6.75 |
| Kenya | — | $11.99 |
| Kosovo | — | €5.99$6.82 |
| Kuwait | — | $9.99 |
| Kyrgyzstan | — | $4.99 |
| Lao Peoples Democratic Republic | — | $4.99 |
| Latvia | — | €3.99$4.54 |
| Lebanon | — | $4.99 |
| Liberia | — | $9.99 |
| Libya | — | $9.99 |
| Lithuania | — | €2.99$3.41 |
| Luxembourg | — | €5.99$6.82 |
| Macao | — | $4.99 |
| Macedonia | — | $4.99 |
| Madagascar | — | $9.99 |
| Malawi | — | $9.99 |
| Malaysia | — | MYR 4.90$1.20 |
| Maldives | — | $4.99 |
| Mali | — | $9.99 |
| Malta | — | €5.99$6.82 |
| Mauritania | — | $9.99 |
| Mauritius | — | $5.99 |
| Mexico | — | MX$29.00$1.70 |
| Micronesia | — | $9.99 |
| Moldova | — | $0.99 |
| Mongolia | — | $1.99 |
| Montenegro | — | €4.99$5.68 |
| Montserrat | — | $9.99 |
| Morocco | — | $11.99 |
| Mozambique | — | $9.99 |
| Myanmar | — | $4.99 |
| Namibia | — | $9.99 |
| Nauru | — | $9.99 |
| Nepal | — | $11.99 |
| Netherlands | — | €3.99$4.63 |
| New Zealand | — | NZ$6.99$3.95 |
| Nicaragua | — | $4.99 |
| Niger | — | $9.99 |
| Nigeria | — | NGN 14,900.00$11.21 |
| Norway | — | NOK 59.00$6.20 |
| Oman | — | $4.99 |
| Pakistan | — | PKR 1,300$4.69 |
| Palau | — | $9.99 |
| Panama | — | $4.99 |
| Papua New Guinea | — | $9.99 |
| Paraguay | $24.99 | $9.99 |
| Peru | — | PEN 22.90$6.74 |
| Philippines | — | ₱79.00$1.26 |
| Poland | — | PLN 9.99$2.60 |
| Portugal | — | €2.99$3.41 |
| Qatar | QAR 99.99$27.47 | QAR 49.99$13.73 |
| Romania | — | RON 19.99$4.32 |
| Russia | — | RUB 449.00$5.19 |
| Rwanda | — | $9.99 |
| Sao Tome & Principe | — | $9.99 |
| Saudi Arabia | — | SAR 19.99$5.33 |
| Senegal | — | $11.99 |
| Serbia | — | €5.99$6.82 |
| Seychelles | — | $9.99 |
| Sierra Leone | — | $9.99 |
| Singapore | — | SGD 6.98$5.45 |
| Slovakia | — | €2.99$3.41 |
| Slovenia | — | €5.99$6.82 |
| Solomon Islands | — | $9.99 |
| South Africa | — | ZAR 49.99$3.06 |
| South Korea | — | ₩7,700$5.67 |
| Spain | — | €2.99$3.41 |
| Sri Lanka | — | $9.99 |
| St. Kitts and Nevis | — | $9.99 |
| St. Lucia | — | $9.99 |
| St. Vincent & The Grenadines | — | $2.99 |
| Suriname | — | $9.99 |
| Swaziland | — | $9.99 |
| Sweden | — | SEK 29.00$2.93 |
| Switzerland | — | CHF 4.00$4.83 |
| Taiwan | — | NT$120.00$3.78 |
| Tajikistan | — | $9.99 |
| Tanzania | — | TZS 29,900.00$11.26 |
| Thailand | — | THB 49.00$1.49 |
| Tonga | — | $9.99 |
| Trinidad and Tobago | — | $9.99 |
| Tunisia | — | $9.99 |
| Turkey | — | TRY 129.99$2.69 |
| Turkmenistan | — | $9.99 |
| Turks and Caicos | — | $9.99 |
| Uganda | — | $11.99 |
| Ukraine | — | $2.99 |
| United Arab Emirates | AED 99.99$27.25 | AED 19.99$5.45 |
| United Kingdom | — | £2.99$4.05 |
| United States | — | $6.29 |
| Uruguay | — | $4.99 |
| Uzbekistan | — | $4.99 |
| Vanuatu | — | $9.99 |
| Venezuela | — | $9.99 |
| Yemen | — | $9.99 |
| Zambia | — | $11.99 |
| Zimbabwe | — | $11.99 |
Slime Castle: Idle TD RTS Game FAQ
- Is Slime Castle: Idle TD RTS Game free?
- Yes. The app and its basic features are free, in all 173 countries it sells in. Premium features are paid: they start from $2.49 (US), across 10 one-time purchases.
- Does Slime Castle: Idle TD RTS Game have a free trial?
- No. None of its offers (US) come with a free trial.
- Where is Slime Castle: Idle TD RTS Game cheapest?
- A one-time purchase costs $0.99 in Georgia and $14.99 in Bahrain, its cheapest and dearest countries.
- What are the best alternatives to Slime Castle: Idle TD RTS Game?
- Lucky Defense! (4.5 from 133,378 reviews, premium from $3.99), Legend of Mushroom (4.6 from 46,566 reviews, premium from $0.99) and Boom Castle: Tower Defense TD (4.7 from 45,859 reviews, premium from $0.99).
Slime Castle: Idle TD RTS Game download
Last updated 1 month ago.
Slime Castle: Idle TD RTS Game sells in 173 countries. It was released 2 years and 5 months ago, on 3 May 2024. It holds a 4.8 rating from 34,122 reviews.
Supports 31 languages: English, Arabic, Bulgarian, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Polish, Portuguese, Romanian, Russian, Chinese, Slovak, Spanish, Swedish, Thai, Turkish, Ukrainian, Vietnamese.
How much does Slime Castle: Idle TD RTS Game make?
Third-party estimates for the last 30 days, worldwide — not the store's own figures, which Apple publishes for nobody.
Revenue by plan
- One-time 100%
- Weekly 0%
Revenue by country
- United States 37%
- Taiwan 10%
- Japan 9%
- Russia 6%