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.
Adrenaline Gamer is a full Half-Life Deathmatch replacement mod and is considered to be the Promod for Half-Life. For those of you who are unfamiliar with Adrenaline Gamer, think of it as an extension to HLDM which offers more choices, more control, more options, more features... and ultimately more fun!
Unzip in your Half-Life Folder.