Part of the long-lasting influence of Half-Life is that the technology the two games runs on has just as much influence on game creation as the games themselves: witness Counter-Strike, the most successful PC mod of all time, and the dozens of creative and successful Half-Life 2 mods. One Half-Life 2 mod that caught UGO's eye is Zombie Master, a total conversion mod developed by a team headed up by Angry Lawyer that uses the Half-Life 2 Source engine to put a new twist on the traditional zombie apocalypse.
