Games like Star Sonata 2 - Starter Pack
Games like Star Sonata 2 - Starter Pack include Space Engineers, Kerbal Space Program, Kerbal Space Program 2, Albion Online, and Trove. We matched them by the tags players give Star Sonata 2 - Starter Pack on Steam (Space, Sandbox, MMORPG, Base Building, and RPG): closest matches first, and among equally close ones the better-known games.

Space Engineers
Shared: Sandbox · Space · Building

Kerbal Space Program
Shared: Space · Sandbox · Building

Kerbal Space Program 2
Shared: Space · Sandbox · Building

Albion Online
Shared: MMORPG · Sandbox · RPG

Trove
Shared: MMORPG · Sandbox · RPG

Dyson Sphere Program
Shared: Space · Base Building · Building

EVE Online
Shared: Space · Sandbox · Trading

Stormworks: Build and Rescue
Shared: Sandbox · Base Building · Building

Myth of Empires
Shared: Sandbox · MMORPG · Building

Universe Sandbox
Shared: Sandbox · Space · Science

Pax Dei
Shared: Sandbox · MMORPG · Base Building

Oxygen Not Included
Shared: Base Building · Sandbox · Building

Avorion
Shared: Sandbox · Space · Building

Scrap Mechanic
Shared: Sandbox · Building · Base Building

Stationeers
Shared: Base Building · Sandbox · Space

Spaceflight Simulator
Shared: Sandbox · Space · Science

Juno: New Origins
Shared: Building · Base Building · Sandbox

Prison Architect
Shared: Sandbox · Base Building · Building

Space Haven
Shared: Base Building · Space · Sandbox

Star Trek Online
Shared: Space · MMORPG · RPG

Garry's Mod
Shared: Sandbox · Building · Physics

Starminer
Shared: Sandbox · Space · RPG

Reassembly
Shared: Space · Sandbox · Building

ASTRONEER
Shared: Space · Base Building · Sandbox