Games like Slime Research
Games like Slime Research include Webbed, Planet of Lana, Celeste, Trine Enchanted Edition, and Trine 2: Complete Story. We matched them by the tags players give Slime Research on Steam (Physics, 2D Platformer, Cute, Puzzle Platformer, and Platformer): closest matches first, and among equally close ones the better-known games.

Webbed
Shared: 2D Platformer · Physics · Cute

Planet of Lana
Shared: 2D Platformer · Puzzle Platformer · Female Protagonist

Celeste
Shared: 2D Platformer · Platformer · Female Protagonist

Trine Enchanted Edition
Shared: 2D Platformer · Physics · Puzzle Platformer

Trine 2: Complete Story
Shared: 2D Platformer · Puzzle Platformer · Platformer

Öoo
Shared: 2D Platformer · Puzzle Platformer · Cute

Defy Gravity Extended
Shared: Puzzle Platformer · Platformer · 2D

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Female Protagonist · Cute

Portal 2
Shared: Platformer · Puzzle Platformer · Female Protagonist

INSIDE
Shared: Puzzle Platformer · 2.5D · 2D Platformer

Braid
Shared: 2D Platformer · Puzzle Platformer · Platformer

Chained Together
Shared: Platformer · Puzzle Platformer · Physics

Placid Plastic Duck Simulator
Shared: Physics · Cute · Relaxing

The Pedestrian
Shared: Puzzle Platformer · 2D Platformer · Platformer

Portal
Shared: Puzzle Platformer · Physics · Female Protagonist

Munin
Shared: Puzzle Platformer · 2D Platformer · Physics

Zup!
Shared: Physics · 2D · Puzzle Platformer

Brawlhalla
Shared: 2D Platformer · Controller · Platformer

BattleBlock Theater®
Shared: Level Editor · Platformer · 2D Platformer

Zup! S
Shared: Physics · 2D · Cute

Super Meat Boy
Shared: 2D Platformer · Platformer · Controller

Zup! 2
Shared: Physics · 2D · Puzzle Platformer

Zup! F
Shared: Physics · 2D · Puzzle Platformer

LIMBO
Shared: Puzzle Platformer · Platformer · 2D