Closed Source

Either the code or the artwork for these games is generally closed source and the game is usually released under a proprietary license.

Displaying 13 - 24 of 1704 games in this category. All games

Synergy

Synergy is a simple Half-Life 2 Modification (Mod) that enables you to play through the Half-Life 2 series and many other 3rd-party...
Genre: Shooter, Adventure, Action

Headcrab Frenzy!

Headcrab Frenzy is a free dynamic action Half-Life mod which allows you to quench a desire to destroy these little bouncy critters...
Genre: Action

Mare Nostrum

Experience some of the fiercest battles of WWII across North Africa with Mare Nostrum.
Genre: Action

Darkest Hour: Europe '44-'45

Based on the award winning Red Orchestra: Ostfront, Darkest Hour: Europe ‘44-’45 is a free, online multiplayer, total-conversion...
Genre: Shooter, Simulation, Action

Aperture Tag: The Paint Gun Testing Initiative

Aperture Tag: The Paint Gun Testing Initiative is a Portal 2 Mod.
Genre: Puzzle, Strategy, Adventure, Action

Bud Spencer & Terence Hill - Slaps And Beans

Bud Spencer and Terence Hill in their first virtual adventure.
Genre: Arcade, Beat 'Em Up, Adventure, Action

Slashers: The Power Battle

Get ready for intense 2D arcade fighting.
Genre: Action

Half-Life: Caged

C.A.G.E.D. is an explosive prison escape adventure! Break-out and battle your way to freedom in this electrifying modification for Half-Life.
Genre: Shooter, Adventure, Action

LandTraveller

See a world from a new perspective in this animal-ear themed constructive action RPG!
Genre: Adventure

Xenomarine

Experience hardcore, sci-fi dungeon crawling in this dark, atmospheric roguelike.
Genre: Strategy, Adventure

Super Night Riders

A modern arcade racing game inspired by the retro classics.
Genre: Arcade, Sports, Simulation

Project 5: Sightseer

Open world multiplayer sandbox game.
Genre: Adventure