Free games like Slime Kingdom: Idle
Below are 8 free-to-play Steam games similar to Slime Kingdom: Idle, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Slime Kingdom: Idle page.
Ranked picks
- 1
Helltaker
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie with Slime Kingdom: Idle.
Helltaker is a short game about sharply dressed demon girls.
- 2
Bongo Cat
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie with Slime Kingdom: Idle.
Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?
- 3
The Murder of Sonic the Hedgehog
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie and Casual with Slime Kingdom: Idle.
Sonic the Hedgehog...was murdered!? Get to the bottom of the mystery in this brand-new adventure!
- 4
Sheepy: A Short Adventure
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie and Casual with Slime Kingdom: Idle.
A Short Handcrafted Pixel Art Platformer that follows Sheepy, an abandoned plushy brought to life. Sheepy: A Short Adventure is the first short game from MrSuicideSheep.
- 5
Our Life: Beginnings & Always
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie and Casual with Slime Kingdom: Idle.
A twenty-dollar bill, four summers, fifteen years, and a one of a kind life. Create an experience that’s all your own in this near-fully customizable visual novel where you grow from childhood to adulthood with the lonely boy next door.
- 6
NGU IDLE
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie with Slime Kingdom: Idle.
NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!
- 7
Awaria
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie with Slime Kingdom: Idle.
Awaria is a short game about working in haunted maintenance tunnels.
- 8
Travellin Cats in Paris
Free-to-play alternative to Slime Kingdom: Idle — no purchase or trial window. Shares Indie and Casual with Slime Kingdom: Idle.
Find 100 cats hidden in Paris, France in this cute hand-drawn hidden object game by Travellin Cats - the original viral hidden cat game creator!