Games like Diaspora
Games like Diaspora include LIMBO, Little Nightmares, Seen, Portal 2, and Little Nightmares II. We matched them by the tags players give Diaspora on Steam (Puzzle, Puzzle Platformer, Post-apocalyptic, Dark, and Adventure): closest matches first, and among equally close ones the better-known games.

LIMBO
Shared: Puzzle Platformer · Puzzle · Indie

Little Nightmares
Shared: Puzzle Platformer · Adventure · Puzzle

Seen
Shared: Dark · Puzzle · Indie

Portal 2
Shared: Puzzle · Singleplayer · Puzzle Platformer

Little Nightmares II
Shared: Puzzle · Adventure · Dark

INSIDE
Shared: Puzzle Platformer · Dark · Indie

FAR: Lone Sails
Shared: Post-apocalyptic · Adventure · Puzzle

Pinstripe
Shared: Adventure · Indie · Puzzle Platformer

Sally Face - Episode One
Shared: Puzzle · Dark · Indie

The Last Campfire
Shared: Puzzle · Adventure · Singleplayer

Nihilumbra
Shared: Puzzle · Adventure · Indie

Poppy Playtime
Shared: Puzzle · Singleplayer · Dark

FEZ
Shared: Puzzle · Indie · Platformer

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

Braid
Shared: Puzzle · Puzzle Platformer · Indie

GRIS
Shared: Indie · Adventure · Singleplayer

Hue
Shared: Puzzle · Puzzle Platformer · Indie

Fran Bow
Shared: Puzzle · Adventure · Story Rich

Portal
Shared: Puzzle · Puzzle Platformer · Singleplayer

COCOON
Shared: Puzzle · Adventure · Puzzle Platformer

Creepy Tale
Shared: Puzzle Platformer · Puzzle · Adventure

Oddworld: New 'n' Tasty
Shared: Puzzle Platformer · Puzzle · Adventure

Deadlight
Shared: Post-apocalyptic · Indie · Adventure

Squishy the Suicidal Pig
Shared: Puzzle · Puzzle Platformer · Indie