Kill as much alien insect bastards as possible. Formido is one of those games, where you are loaded with some guns and you go shooting different things. 'Things' in this case are big, ugly, - not green though - alien insects. The idea is to kill as many of those bastards as possible. Eventually they will overcome you, but struggle as long as you can. There are some power-ups to aid you in your honorable quest. Keep in mind, that those critters are rather tough and generally do nasty things when in close range of any player-characters.