Gametrailers offers the debut trailer for Tunnel Rats (referring to the title as "1968 Tunnel Rats"), Replay Studios' first-person shooter based on the upcoming Uwe Boll war movie that is surprisingly not already based on an existing game. The clip shows off the game's Vietnam War environments (both in and out of tunnels), and explains what the army has trained you for (fighting in tunnels and jungles), and what it has not trained you for (watching helicopters crash). Tunnel Rats was originally expected early this year along with the movie (story), so it is obviously delayed; Eurogamer says the game is due this autumn (and adding to the confusion, they call the title "Tunnel Rats 1968"), but the IMDB lists the movie's release date as March 13, 2009, so we'd bet that's when to expect the game, too.