Portal comprises a series of puzzles that must be solved by teleporting the player's character and simple objects using the "portal gun", a device that can create inter-spatial portals between flat...

Half-Life is a science fiction first-person shooter video game developed by Valve Software, the company's debut product and the first in the Half-Life series.

DOSBox is a DOS-emulator that uses the SDL-library. DOSBox emulates CPU:286/386 realmode/protected mode, Directory FileSystem/XMS/EMS, Tandy/Hercules/CGA/EGA/VGA/VESA graphics, a SoundBlaster/Gravis Ultra Sound card for...

Steam is a digital distribution, digital rights management, multiplayer and communications platform developed by Valve Corporation. It is used to distribute a wide range of games and related media entirely over the...