Games like The Endless Sky
Games like The Endless Sky include No Man's Sky, Elite Dangerous, Where Winds Meet, Once Human, and Trove. We matched them by the tags players give The Endless Sky on Steam (Casual, Multiplayer, Massively Multiplayer, Exploration, and Space): closest matches first, and among equally close ones the better-known games.

No Man's Sky
Shared: Space · Exploration · Multiplayer

Elite Dangerous
Shared: Space · Exploration · Massively Multiplayer

Where Winds Meet
Shared: Multiplayer · Free to Play · Casual

Once Human
Shared: Multiplayer · Free to Play · Exploration

Trove
Shared: Multiplayer · Free to Play · Procedural Generation

ASTRONEER
Shared: Multiplayer · Space · Exploration

Tower Unite
Shared: Casual · Multiplayer · Massively Multiplayer

Starbound
Shared: Space · Multiplayer · Sandbox

Garry's Mod
Shared: Multiplayer · Casual · Sandbox

Albion Online
Shared: Massively Multiplayer · Multiplayer · Free to Play

Destiny 2
Shared: Multiplayer · Free to Play · Massively Multiplayer

Star Trek Online
Shared: Massively Multiplayer · Space · Multiplayer

Palia
Shared: Multiplayer · Exploration · Free to Play

Terraria
Shared: Multiplayer · Sandbox · Exploration

Brawlhalla
Shared: Multiplayer · Casual · Free to Play

Delta Force
Shared: Multiplayer · Massively Multiplayer · Free to Play

SpaceCraft
Shared: Space · Massively Multiplayer · Multiplayer

Stellaris
Shared: Space · Exploration · Multiplayer

Space Engineers
Shared: Space · Multiplayer · Sandbox

Marvel Rivals
Shared: Multiplayer · Free to Play · Casual

Fishing Planet
Shared: Multiplayer · Massively Multiplayer · Free to Play

WEBFISHING
Shared: Multiplayer · Casual · Indie