Game category: Puzzle
Ortheo
Ortheo is a bite-sized open-world momentum-based 3D platformer.
OS Omega
You are Binary Boy, an agent of OS Omega and your goal is to defeat the virus that wants to format the C drive of the computer you must protect.
Osyaberi! Puzzle Chigatan ～Spot the Differences with Everyone～
A “Spot the Differences” game filled with creative illustrations! There are 500 stages! Plus, the puzzles are randomly generated each time for never-ending fun!
Otoko Cross: Pretty Boys Dropout!
Puzzle your way through block-sliding stages as you get to know a cast of otokonoko characters!
Otto
Pull me up!
Our Flick Erasers
Flick! Bump! Knock off!
Out of Moves
Outbuddies DX
Following a shipwreck, maritime archaeologist Nikolay Bernstein regains consciousness 36,000 feet under the sea.
1 cheat
Overloop
Make clones. Save the world.
Overmorrow
Overmorrow is a serene, nonviolent, exploration adventure game that deletes your save after 30 days.