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Slime Kingdom: Idle

Slime Kingdom: Idle

by NuDal games

★ 43%
Price $4.99
Avg Players 1
Reviews 7
Released Apr 30, 2026
2DCasualClickerComedy
View on Steam ↗

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Slime Kingdom: Idle is a casual incremental game where you recruit slimes to handle tasks across your growing kingdom, with multiple progression layers including quests, equipment, and crafting. Early gameplay introduces new mechanics at a steady pace, though progression slows significantly later on. Best suited for players seeking a light idle experience during active play, though the lack of offline progression and the extreme time commitment for full completion may deter some.

About this game

What players are saying

▲ Recommended 1 hrs
Solid idle/incremental game about recruiting slimes to do various tasks.

(If you are an achievement hunter, be warned there is an achievement to play the game for 999 hours. This might be a deal breaker for some players)
7 found helpful Steam ↗
▲ Recommended 75 hrs
Idle & Incremental Lovers recommends Slime Kingdom: Idle.
Good first game for a solo dev. First few hours are pretty enjoyable: new gameplay elements are regularly introduced. But the pacing sadly becomes slower and slower the more you progress afterwards.
+ Multiple gameplay layers (quests, units, equipment, crafting, upgrades...) make it an interesting game to play in the first few hours.
+ UI is clear, music and art are OK. Nothing really stands out, but it's good and clean work
+ Slimes: aren't they the best creatures in videogames? (Dunno about real life, have yet to meet one.)
+ Dev is a real gentleman and actively tried to solve some issues I had with the game.
- Passed a certain point, it takes way too much money to unlock the next quest, to the point it becomes a boring grind. A simple balancing patch could fix that.
- The "world" feature (commerce, sign treaties and go to war with neighboring lands), introduced in the late game, is a quite obscure mechanic. You feel like you don't have the data and keys to understand the impact of your choices.
- In fact, you're often left in the dark about what you need to do to unlock this or that (a new crafting recipe, a new valuable treaty or war, a new unit...). It's also unclear what some upgrades do, like upgrading job places. Due to the very slow pacing of the endgame, it's also annoying to ignore when the game will end (= what are the win conditions).
==> Overall, I'd still recommend the game, especially if you want to support a solo dev who seems to have good ideas in his bag, which is promising for future games to come.
*Slime time is the best time!*
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2 found helpful Steam ↗
▼ Not recommended 11 hrs
A decent idle game, but it does not have any offline progression, so can not recommend it.
1 found helpful Steam ↗

Reviews are by Steam users, hosted on Steam.

Latest updates

SLIME KINGDOM: IDLE - WHAT'S NEW

2 days ago
SMALL FIXES - Fixed some steam achievements - Corrected certain slimes sliminess Got feedback? We'd love to hear it. Have fun out there!

SLIME KINGDOM: IDLE - WHAT'S NEW

19 days ago
SMALL FIXES - Fixed several memory leaks in late game. Big apologies for the players that have been facing this. I am working hard on my free time whenever I can until this is resolved. Thank you for your support. Got feedback? We'd love to hear it. Have fun out there!

Posts come from Steam's official announcements feed.

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