Games like SPACEPLAN
Games like SPACEPLAN include Banana, Cookie Clicker, To The Core, Outer Wilds, and Idle Champions of the Forgotten Realms. We matched them by the tags players give SPACEPLAN on Steam (Incremental, Casual, Indie, Space, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Banana
Shared: Incremental · Casual · Singleplayer

Cookie Clicker
Shared: Incremental · Casual · Indie

To The Core
Shared: Incremental · Casual · Indie

Outer Wilds
Shared: Space · Great Soundtrack · Adventure

Idle Champions of the Forgotten Realms
Shared: Incremental · Idler · Indie

Mountain
Shared: Casual · Indie · Great Soundtrack

Keep on Mining!
Shared: Incremental · Casual · Indie

Melvor Idle
Shared: Casual · Indie · Idler

Waveform
Shared: Indie · Casual · Great Soundtrack

A Game About Feeding A Black Hole
Shared: Incremental · Casual · Indie

To the Moon
Shared: Indie · Great Soundtrack · Singleplayer

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · Singleplayer

Rebel Galaxy
Shared: Space · Great Soundtrack · Sci-fi

GRIS
Shared: Indie · Great Soundtrack · Adventure

Click the Button
Shared: Casual · Incremental · Indie

Space Rock Breaker
Shared: Incremental · Casual · Space

FTL: Faster Than Light
Shared: Space · Indie · Singleplayer

Deep Space Cache
Shared: Casual · Incremental · Indie

Donut County
Shared: Casual · Indie · Great Soundtrack

Deliver Us The Moon
Shared: Indie · Space · Adventure

Little Inferno
Shared: Casual · Indie · Singleplayer

Dragon Cliff
Shared: Incremental · Casual · Idler

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

Deskrawl: Idle ARPG
Shared: Casual · Incremental · Idler