Games like Relative Frame
Games like Relative Frame include Terraria, No Man's Sky, Elite Dangerous, EVE Online, and Starbound. We matched them by the tags players give Relative Frame on Steam (Action, Adventure, Sandbox, Space Sim, and Exploration): closest matches first, and among equally close ones the better-known games.
Terraria
Shared: Sandbox · Adventure · 2D
No Man's Sky
Shared: Exploration · Adventure · Sandbox
Elite Dangerous
Shared: Space Sim · Exploration · Action
EVE Online
Shared: Space Sim · Adventure · Exploration
Starbound
Shared: Sandbox · Adventure · Exploration
Avorion
Shared: Sandbox · Space Sim · Exploration
Escape From Duckov
Shared: Action · Adventure · Exploration
Fallout 4
Shared: Adventure · Exploration · Action
Hyper Light Drifter
Shared: Adventure · Action · Pixel Graphics
Deliver Us The Moon
Shared: Adventure · Action · Space Sim
Star Valor
Shared: Action · Sandbox · Exploration
3030 Deathwar Redux - A Space Odyssey
Shared: Adventure · Action · Sandbox
Core Keeper
Shared: Exploration · Sandbox · Action
Just Cause 2
Shared: Action · Sandbox · Adventure
Forager
Shared: Sandbox · Adventure · Pixel Graphics
SPORE™ Galactic Adventures
Shared: Action · Adventure · Exploration
Just Cause™ 3
Shared: Action · Adventure · Sandbox
Trailmakers
Shared: Action · Adventure · Sandbox
Rise of the Tomb Raider™
Shared: Action · Adventure · Exploration
STAR WARS Jedi: Survivor™
Shared: Action · Adventure · Exploration
Starcom: Nexus
Shared: Action · Adventure · Exploration
X Rebirth
Shared: Action · Space Sim · Sandbox
Rebel Galaxy
Shared: Adventure · Action · Space Sim
X4: Foundations
Shared: Space Sim · Sandbox · Exploration