Outrageous Grounds: The Maze
Windows
Outside
Outskirts
Linux, macOS, Windows
Otto the Odd Ostrich
macOS, Windows
Our Darkest Night
Our End of the World
Sky Road
Sky Tower
Sky Valley
Legends of the Universe - StarCore
Legends of Time
Legion Tale
Legions of Tyrandel
Legends of Persia
Legends of Pixelia
SkyTime
Nintendo Switch, Linux, macOS, and 1 more
Undead Overlord
Undead Shadows
Skyway
Outpost 13
Outpost L5
Outracer
Slimebrawl
Sling Ming
Nintendo Switch, macOS, Windows
Slinger VR
SLI-FI: 2D Planet Platformer
Slice of Life
Slice the Ice
Slam
Slam Fighter II