Games like Triangles
Games like Triangles include Incredibox, Zup! S, Human Resource Machine, Baba Is You, and A Dance of Fire and Ice. We matched them by the tags players give Triangles on Steam (Casual, Utilities, Audio Production, Rhythm, and 2D): closest matches first, and among equally close ones the better-known games.

Incredibox
Shared: Casual · Rhythm · 2D

Zup! S
Shared: Casual · 2D · Puzzle

Human Resource Machine
Shared: Casual · Programming · Education

Baba Is You
Shared: Puzzle · Logic · 2D

A Dance of Fire and Ice
Shared: Rhythm · 2D · Casual

Purple Place - Classic Games
Shared: Casual · 2D · Logic

Scribblenauts Unlimited
Shared: Casual · 2D · Puzzle

Is This Seat Taken?
Shared: Casual · Puzzle · Logic

Hook
Shared: Casual · Puzzle · 2D

Strange Jigsaws
Shared: Casual · 2D · Puzzle

RetroMaze
Shared: Casual · 2D · Puzzle

Opus Magnum
Shared: Programming · Puzzle · Logic

Glass Masquerade 3: Honeylines
Shared: Casual · 2D · Puzzle

Hexcells
Shared: Casual · Logic · Puzzle

Rocksmith® 2014 Edition REMASTERED LEARN & PLAY
Shared: Rhythm · Casual · Education

Rhythia
Shared: Casual · Rhythm · 2D

Zup! X
Shared: Casual · 2D · Puzzle

AudioSurf
Shared: Casual · Rhythm · Music-Based Procedural Generation

Muse Dash
Shared: Rhythm · Casual · 2D

Zup! Z
Shared: Casual · 2D · Puzzle

A=B
Shared: Casual · Education · Programming

while True: learn()
Shared: Education · Programming · Puzzle

Zup! F
Shared: Casual · 2D · Puzzle

Peggle Deluxe
Shared: Casual · 2D · Puzzle