Games like Conundrum
Games like Conundrum include Celeste, Thomas Was Alone, Braid, Monument Valley 2, and Planet of Lana. We matched them by the tags players give Conundrum on Steam (Side Scroller, Precision Platformer, Turn-Based Tactics, 2D Platformer, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Celeste
Shared: Precision Platformer · 2D Platformer · Indie

Thomas Was Alone
Shared: Side Scroller · Precision Platformer · 2D Platformer

Braid
Shared: Puzzle Platformer · 2D Platformer · Puzzle

Monument Valley 2
Shared: Puzzle · Precision Platformer · Puzzle Platformer

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

Your Only Move Is HUSTLE
Shared: Turn-Based Tactics · Side Scroller · Strategy

Öoo
Shared: Puzzle Platformer · 2D Platformer · Puzzle

The Pedestrian
Shared: Side Scroller · Puzzle Platformer · Puzzle

Leap Year
Shared: Precision Platformer · 2D Platformer · Puzzle Platformer

LIMBO
Shared: Puzzle Platformer · Puzzle · Side Scroller

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

Tinboy
Shared: Side Scroller · Precision Platformer · 2D Platformer

Super Meat Boy
Shared: Precision Platformer · 2D Platformer · Indie

N++ (NPLUSPLUS)
Shared: Precision Platformer · 2D Platformer · Parkour

Zup!
Shared: Puzzle · Puzzle Platformer · Casual

Webbed
Shared: 2D Platformer · Puzzle Platformer · Puzzle

The Deletion
Shared: Side Scroller · Precision Platformer · 2D Platformer

Geometry Dash
Shared: Precision Platformer · Side Scroller · 2D

Zup! 4
Shared: Puzzle · Puzzle Platformer · Casual

Into the Breach
Shared: Turn-Based Tactics · Strategy · Puzzle

!AnyWay!
Shared: Side Scroller · Precision Platformer · 2D Platformer

Zup! 3
Shared: Puzzle · Puzzle Platformer · Casual

Downwell
Shared: Precision Platformer · 2D Platformer · Indie

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