Games like Slingshottr
Games like Slingshottr include No Man's Sky, Among Us, Elite Dangerous, PEAK, and Cosmoteer: Starship Architect & Commander. We matched them by the tags players give Slingshottr on Steam (Space, 2D, Multiplayer, Casual, and Physics): closest matches first, and among equally close ones the better-known games.

No Man's Sky
Shared: Space · Multiplayer · Sci-fi

Among Us
Shared: Multiplayer · Space · 2D

Elite Dangerous
Shared: Space · Sci-fi · Multiplayer

PEAK
Shared: Multiplayer · Physics · Adventure

Cosmoteer: Starship Architect & Commander
Shared: Space · 2D · Sci-fi

Terraria
Shared: Multiplayer · 2D · Adventure

Gang Beasts
Shared: Multiplayer · Physics · Casual

Warhammer 40,000: Space Marine 2
Shared: Multiplayer · Action · Adventure

Starbound
Shared: Space · Multiplayer · Adventure

ShellShock Live
Shared: Multiplayer · 2D · Action

STAR WARS™ Battlefront™ II
Shared: Multiplayer · Space · Sci-fi

RV There Yet?
Shared: Multiplayer · Physics · Adventure

Castle Crashers®
Shared: 2D · Multiplayer · Adventure

LEGO® Star Wars™: The Skywalker Saga
Shared: Multiplayer · Space · Adventure

Pikuniku
Shared: Casual · Multiplayer · Adventure

Trailmakers
Shared: Space · Action · Adventure

How to Fish
Shared: Multiplayer · Physics · Adventure

Stick Fight: The Game
Shared: Multiplayer · 2D · Action

HELLDIVERS™ 2
Shared: Multiplayer · Action · Space

Wobbly Life
Shared: Multiplayer · Adventure · Casual

Garry's Mod
Shared: Multiplayer · Physics · Casual

ASTRONEER
Shared: Multiplayer · Space · Exploration

Human Fall Flat
Shared: Multiplayer · Physics · Adventure

LOCKDOWN Protocol
Shared: Multiplayer · Space · Casual