Games like Gravitia
Games like Gravitia include Portal 2, Outer Wilds, Blue Prince, Poppy Playtime, and The House of Da Vinci. We matched them by the tags players give Gravitia on Steam (Adventure, Puzzle, 3D, Linear, and Mystery): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Puzzle · Singleplayer · Platformer

Outer Wilds
Shared: Adventure · Mystery · Puzzle

Blue Prince
Shared: Puzzle · Mystery · Adventure

Poppy Playtime
Shared: Puzzle · Singleplayer · Free to Play

The House of Da Vinci
Shared: Puzzle · Mystery · Adventure

The Room 4: Old Sins
Shared: Puzzle · Adventure · Mystery

FEZ
Shared: Puzzle · Adventure · Platformer

COCOON
Shared: Adventure · Puzzle · 3D

PEAK
Shared: Adventure · Physics · 3D

Chants of Sennaar
Shared: Adventure · Puzzle · Singleplayer

Sonic Frontiers
Shared: Adventure · 3D · Singleplayer

Stray
Shared: Adventure · Singleplayer · Puzzle

Lorelei and the Laser Eyes
Shared: Adventure · Puzzle · Mystery

LIMBO
Shared: Puzzle · Adventure · Platformer

Supraland
Shared: Adventure · Puzzle · Exploration

The Room Three
Shared: Puzzle · Adventure · Mystery

Ori and the Will of the Wisps
Shared: Adventure · Platformer · Singleplayer

The Room
Shared: Puzzle · Mystery · Adventure

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Mystery

Riven
Shared: Adventure · Puzzle · Singleplayer

Monument Valley
Shared: Puzzle · Adventure · Singleplayer

Murders on the Yangtze River
Shared: Puzzle · Adventure · Mystery

Indiana Jones and the Great Circle
Shared: Puzzle · Adventure · Singleplayer

Rise of the Tomb Raider™
Shared: Adventure · Singleplayer · Puzzle