Games like Slimecity
Games like Slimecity include Total War: WARHAMMER III, Vampire Survivors, (the) Gnorp Apologue, Yokai Art: Night Parade of One Hundred Demons, and RACCOIN: Coin Pusher Roguelike. We matched them by the tags players give Slimecity on Steam (Real Time Tactics, Roguelite, Incremental, PvE, and RTS): closest matches first, and among equally close ones the better-known games.

Total War: WARHAMMER III
Shared: Real Time Tactics · Strategy · RTS

Vampire Survivors
Shared: Roguelite · 2D · Roguelike

(the) Gnorp Apologue
Shared: Incremental · Roguelite · Strategy

Yokai Art: Night Parade of One Hundred Demons
Shared: Roguelite · Real Time Tactics · Strategy

RACCOIN: Coin Pusher Roguelike
Shared: Roguelike · Strategy · Roguelite

Tabletop Tavern
Shared: Real Time Tactics · RTS · Roguelite

Astro Prospector
Shared: Incremental · Roguelite · Roguelike

Skul: The Hero Slayer
Shared: Roguelite · Roguelike · 2D

Balatro
Shared: Roguelike · Roguelite · Strategy

Sir, We Have an Orc Problem
Shared: Incremental · Roguelite · PvE

Bills Must Be Paid
Shared: Roguelite · Incremental · Strategy

The King is Watching
Shared: Roguelike · RTS · Roguelite

Slay the Spire 2
Shared: Roguelike · Strategy · Roguelite

Call to Arms - Gates of Hell: Ostfront
Shared: Real Time Tactics · Strategy · RTS

Total War: WARHAMMER II
Shared: Strategy · RTS · Real Time Tactics

Peglin
Shared: Roguelite · Roguelike · Strategy

FTL: Faster Than Light
Shared: Roguelike · Strategy · Indie

Axon TD: Uprising - Tower Defense
Shared: Real Time Tactics · Roguelite · PvE

Aliens: Dark Descent
Shared: Real Time Tactics · Strategy · RTS

Sephiria
Shared: Roguelite · Roguelike · Action

Ratropolis
Shared: Roguelite · 2D · Strategy

Loop Hero
Shared: Roguelite · Roguelike · Tactical

Timber Rush
Shared: Incremental · Roguelite · Roguelike

Slay the Spire
Shared: Roguelike · Roguelite · Strategy