Games like IINTWO
Games like IINTWO include Human Fall Flat, Zup!, Zup! S, Zup! F, and Zup! 2. We matched them by the tags players give IINTWO on Steam (Casual, Puzzle, Puzzle Platformer, 2.5D, and Relaxing): closest matches first, and among equally close ones the better-known games.

Human Fall Flat
Shared: Puzzle · Physics · Puzzle Platformer

Zup!
Shared: Casual · Puzzle · Physics

Zup! S
Shared: Casual · Puzzle · Relaxing

Zup! F
Shared: Casual · Puzzle · Physics

Zup! 2
Shared: Casual · Puzzle · Physics

Zup! X
Shared: Casual · Puzzle · Physics

PICO PARK
Shared: Puzzle Platformer · Casual · Local Co-Op

Gang Beasts
Shared: Casual · Physics · Local Multiplayer

Zup! 3
Shared: Casual · Puzzle · Physics

Trine 2: Complete Story
Shared: Puzzle Platformer · Puzzle · Local Co-Op

Zup! 8
Shared: Casual · Puzzle · Physics

Zup! Z
Shared: Puzzle · Casual · Indie

It Takes Two
Shared: Puzzle · Local Co-Op · Puzzle Platformer

Zup! 5
Shared: Casual · Puzzle · Physics

Tricky Towers
Shared: Puzzle · Casual · Physics

Zup! 6
Shared: Casual · Puzzle · Physics

Zup! Zero
Shared: Casual · Puzzle · Physics

Assemble with Care
Shared: Casual · Puzzle · Relaxing

Zup! 9
Shared: Casual · Puzzle · Physics

Zup! 7
Shared: Casual · Puzzle · Physics

Donut County
Shared: Casual · Puzzle · Indie

Overcooked! 2
Shared: Casual · Local Co-Op · Multiplayer

Keep Talking and Nobody Explodes
Shared: Puzzle · Local Multiplayer · Local Co-Op

Portal
Shared: Puzzle · Puzzle Platformer · Physics