Named Game of the Year by over 50 publications, Valve's début title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
This map for Half-Life Deathmatch (Not source version!)
Another interesting-time-on Quake III. Here are combined and close bridges and portable Long Jumps, giddy height, and a full arsenal of weapons available on the map. See, not fall in eternity!)