MINERVA is an atmospheric first-person adventure game in which players explore an underground Convent base with help from Minerva, an unseen companion character. The mod was impressive enough to land Foster a job at Valve, where he still works today. Friendly pressure from co-workers resulted in the game's eventual overhaul and Steam release.
Foster notes that the Director's Cut boasts "tweaked visuals, bug fixes, better puzzles and all kinds of subtle improvements." MINERVA is available as a free download, though it requires players to have Half-Life 2: Episode One installed in order to play it.