Games like Solitary PaperPlane
Games like Solitary PaperPlane include Mountain, Superflight, Potion Craft: Alchemist Simulator, House Flipper, and Game Dev Tycoon. We matched them by the tags players give Solitary PaperPlane on Steam (Indie, Flight, Casual, Relaxing, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Mountain
Shared: Indie · Casual · Relaxing

Superflight
Shared: Indie · Flight · Casual

Potion Craft: Alchemist Simulator
Shared: Relaxing · Singleplayer · Indie

House Flipper
Shared: Singleplayer · Relaxing · Simulation

Game Dev Tycoon
Shared: Indie · Casual · Singleplayer

Unpacking
Shared: Relaxing · Casual · Indie

Passpartout: The Starving Artist
Shared: Indie · Casual · Relaxing

Slime Rancher 2
Shared: Relaxing · Singleplayer · Casual

Zup! S
Shared: Indie · Casual · Relaxing

PowerWash Simulator
Shared: Casual · Relaxing · Simulation

A Dance of Fire and Ice
Shared: Indie · Music · Singleplayer

Retrowave
Shared: Indie · Casual · Relaxing

Librarian: Tidy Up the Arcane Library!
Shared: Relaxing · Casual · Singleplayer

Plague Inc: Evolved
Shared: Indie · Singleplayer · Casual

Mini Motorways
Shared: Casual · Indie · Simulation

AudioSurf
Shared: Indie · Casual · Music

Sticky Business
Shared: Casual · Relaxing · Indie

Leaf it Alone
Shared: Relaxing · Casual · Indie

Stardew Valley
Shared: Relaxing · Indie · Simulation

MUSYNX
Shared: Indie · Casual · Singleplayer

Equilinox
Shared: Indie · Casual · Relaxing

DAVE THE DIVER
Shared: Casual · Relaxing · Singleplayer

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

Assemble with Care
Shared: Indie · Casual · Relaxing