Complete Steam Games Database — Every Title, Every Release
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Oort Protocol: Perihelion
Command 4 soldiers through brutal tactical combat in this hardcore roguelike trilogy. No tutorials. No mercy. Learn through failure as you fight across the solar system in a CRT-styled, turn-based war where your choices determine humanity's fate.
Ooze Keeper
Ooze Keeper is a tactical roguelike that combines monster collecting and resource management. You'll harness the unique abilities of various slimes, construct efficient structures, and optimize resources to grow your farm and earn money with each turn. Beware - miss your rent, and it's game over.
Ooze Odyssey
Ooze your way through dank dungeons and dissolve thousands of monsters in this top-down shoot’em up roguelite. Slay enough and gather their essence to earn new cards from the Witch’s deck. Defeat powerful foes and explore deep places to earn more cards for your deck!
Ooze Redux
A NES hard game, made to run and play on original hardware. Ported to the PC. 7 hard and unique levels. An original gripping ChipTune sound track! 8 bit glory in this side scrolling shooter platformer!
Ooze: The Great and Powerful
Play as monster in this puzzle platformer with no jump ability. Move from one room to another, killing all adventurers by your self or using traps on the level. Explore, eat, escape.
Oozi: Earth Adventure
Oozi: Earth Adventure is a classic 2D platformer with old school gameplay - no puzzles, no punishment, just 100% pure classic platforming fun! Its most prominent features are HD visuals and beautiful hand-drawn art, but despite its visual style, it’s a good fit for all kinds of gamers!
Oozing Islands
Enjoy freedom of movement in full 3D with no fixed paths in this tower defense and RTS hybrid. Your units are your towers and you can build fences anywhere. Set your units' behavior to create a perfect team of defenders. Two leader boards let you play forever!
Opa Definitive Edition
Opa Definitive Edition is a 2D drawn obstacle-based game. You will guide a happy square through increasingly more difficult levels, enemies, and bosses with unique environment in their levels.
Opaldune
A scifi third person survival horror. Stranded in the farthest reaches of space, Dr. Belica Gale boards the Opaldune seeking help. But in the bowels of the ship, monsters are prowling. Slip through dark hallways to scavenge for supplies, solve puzzles, and evade enemies long enough to get back out.
Opalescence
The colorful top-down shooter/bullet-hell
Opaline
In this 16-bit style RPG, Gallow and Liza are two teenagers gifted with great powers, and that destiny seems to persist in keeping away from each other, however their feelings drive them close. Can the two of them have what it takes to preserve the world from the rise of the Blight?
Opaloid Kingdom
Take control of a sorcerer in a medieval fantasy land! Explore dark dungeons filled with monsters, travel through new towns and meet crazy wizards while fighting through obstacles that will test your skill through old-school arcade challenges
Opawration!
A 2D, veterinarian horror game. In this game, select the appropriate treatment and treat patients with topical products injections, surgeries. Treat patients over the course of 7 days, using the in-game computer to research the best treatment option. Playtime is 30 minutes.
Ope
Ôpe is a 3D platforming game in which you play as a little hero named Bô. His quest will lead him through enchanted forest and temples where he’ll need to deliver shamans from corruption before the sun sets forever.
Open Air
Summer! Sea! Festival! You've been waiting for this for so long, and here you are! But what is it, why are the stages empty, and everybody around you is sad? Explore the island, learn the stories of the islanders, unlock new strengths during meditations and arrange the loudest and coolest festival!