Games like Slime Battles
Games like Slime Battles include Brawlhalla, Stick Fight: The Game, MARVEL Tōkon: Fighting Souls, ROUNDS, and Rivals of Aether. We matched them by the tags players give Slime Battles on Steam (Action, Casual, eSports, Fighting, and Platformer): closest matches first, and among equally close ones the better-known games.

Brawlhalla
Shared: Fighting · Casual · 2D Fighter

Stick Fight: The Game
Shared: Action · Fighting · 2D Fighter

MARVEL Tōkon: Fighting Souls
Shared: Action · Casual · eSports

ROUNDS
Shared: Fighting · Action · 2D Fighter

Rivals of Aether
Shared: Fighting · 2D Fighter · Platformer

One Finger Death Punch
Shared: Action · 2D Fighter · Fighting

DRAGON BALL FighterZ
Shared: Action · Fighting · 2D Fighter

Street Fighter™ 6
Shared: Fighting · Action · 2D Fighter

Sonic Superstars
Shared: Action · Casual · Platformer

Twin Shot Deluxe
Shared: Action · Casual · Platformer

Broforce
Shared: Action · Platformer · 2D

KarmaZoo
Shared: Action · Casual · Platformer

Rivals of Aether II
Shared: Fighting · Action · 2D Fighter

Pizza Tower
Shared: 2D Platformer · Platformer · Action

Party Animals
Shared: Casual · Action · Fighting

Your Only Move Is HUSTLE
Shared: Action · 2D Fighter · 2D

Tribal Hunter
Shared: Action · Casual · 2D Platformer

Pikuniku
Shared: Casual · Action · Platformer

Streets of Rage 4
Shared: Action · Fighting · 2D

Nidhogg
Shared: eSports · Action · 2D Fighter

JoJo's Bizarre Adventure: All-Star Battle R
Shared: Action · Fighting · 2D Fighter

GUILTY GEAR -STRIVE-
Shared: Fighting · 2D Fighter · Action

Anomaly Agent
Shared: 2D Platformer · Platformer · Side Scroller

Sonic Origins
Shared: Action · 2D Platformer · Casual