Games like SpaceR
Games like SpaceR include Trailmakers, Nuclear Option, Sonic Frontiers, Black Myth: Wukong, and Superflight. We matched them by the tags players give SpaceR on Steam (Action, Physics, Flight, 3D, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Trailmakers
Shared: Action · Flight · Action-Adventure

Nuclear Option
Shared: Flight · Action · Physics

Sonic Frontiers
Shared: Action · 3D Platformer · Action-Adventure

Black Myth: Wukong
Shared: Action · Action-Adventure · Singleplayer

Superflight
Shared: Flight · Action · Indie

Uncrashed : FPV Drone Simulator
Shared: Flight · Physics · 3D

ALTF4
Shared: Physics · Action · Survival

Clustertruck
Shared: Action · Physics · 3D Platformer

Rise of the Tomb Raider™
Shared: Action · Action-Adventure · Singleplayer

Project Wingman
Shared: Action · Flight · Indie

Teardown
Shared: Physics · Indie · Singleplayer

Bomb Rush Cyberfunk
Shared: Action · 3D Platformer · 3D

Crash Bandicoot™ 4: It’s About Time
Shared: Action · 3D Platformer · Action-Adventure

Kena: Bridge of Spirits
Shared: Action · Action-Adventure · 3D Platformer

Fun with Ragdolls: The Game
Shared: Physics · Action · 3D

R.E.P.O.
Shared: Physics · 3D · Survival

Days Gone
Shared: Action · Survival · Singleplayer

Portal 2
Shared: Singleplayer · Action · Action-Adventure

Tomb Raider I-III Remastered Starring Lara Croft
Shared: Action · Action-Adventure · 3D

Megabonk
Shared: Action · Indie · Survival

Instruments of Destruction
Shared: Physics · Action · 3D

Trine Enchanted Edition
Shared: Physics · Action-Adventure · Action

BONEWORKS
Shared: Physics · Action · Singleplayer

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