Team Fortress 2, Valve's team-based shooter released in 2007, pits nine distinct classes against each other, and the Spy and Engineer have one of its longest-running rivalries. The Spy specialises in stealth and backstabs, while the Engineer builds sentries, dispensers and teleporters that slow him down, so lines pitting them against each other quickly became community favourites. Shared on soundboards and reused in gameplay videos, streams and edits, the clip endures because that matchup is still instantly recognisable to TF2 players.