Games like Yunoia
Games like Yunoia include INSIDE, Portal 2, FEZ, Monument Valley, and LIMBO. We matched them by the tags players give Yunoia on Steam (Adventure, Casual, Strategy, Singleplayer, and 2.5D): closest matches first, and among equally close ones the better-known games.

INSIDE
Shared: 2.5D · Puzzle Platformer · Singleplayer

Portal 2
Shared: Singleplayer · Platformer · Puzzle

FEZ
Shared: Platformer · Puzzle · Adventure

Monument Valley
Shared: Adventure · Casual · Singleplayer

LIMBO
Shared: Adventure · Puzzle Platformer · Platformer

Little Nightmares
Shared: Adventure · Singleplayer · Puzzle Platformer

FAR: Lone Sails
Shared: Adventure · Singleplayer · 2.5D

Planet of Lana
Shared: Puzzle Platformer · Adventure · Singleplayer

Chained Together
Shared: Adventure · Casual · Platformer

The Last Campfire
Shared: Adventure · Singleplayer · Puzzle

Brothers - A Tale of Two Sons
Shared: Adventure · Puzzle · Singleplayer

Seen
Shared: Adventure · Singleplayer · Puzzle

Moncage
Shared: Casual · Adventure · Singleplayer

BEEP
Shared: Adventure · Platformer · Singleplayer

Little Nightmares II
Shared: Adventure · Singleplayer · Puzzle

Scribblenauts Unlimited
Shared: Casual · Adventure · Puzzle

A Story About My Uncle
Shared: Adventure · Singleplayer · Platformer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Nihilumbra
Shared: Adventure · Casual · Platformer

GRIS
Shared: Adventure · Singleplayer · Platformer

Idle Champions of the Forgotten Realms
Shared: Strategy · Adventure · Singleplayer

Max: The Curse of Brotherhood
Shared: Adventure · Platformer · Singleplayer

Death Coming/死神来了
Shared: Casual · Strategy · Adventure

The Basement Collection
Shared: Adventure · Strategy · Singleplayer