Team Fortress 2, released by Valve in 2007, features the Engineer as one of its nine playable classes, a Texan builder who constructs sentries, dispensers and teleporters. His voice lines, including short thanks responses triggered through the game's voice menu, became familiar to players through years of matches, and short clips of them later circulated on soundboards and in gameplay edits. The thanks line endures because it is instantly tied to that character and to cooperative play, rather than to a single viral moment.