The "Wraith glitch" in ODST applies both to the Campaign and Firefight modes; it involves first shooting the gunner of a Wraith, then jumping onto - not boarding! - the gunner-less wraith. The player then crouches on top of the Wraith, facing the 'driver' panel, punches the panel off, then headshots the driver while holding the 'board' button (RB in the default configuration). The Wraith is then available to use through the level, though it will explode if the driver gets out. However, a gunner in co-op play can enter and exit the vehicle freely.