It's worth noting that you can't play co-op until you've completed the game's prologue. The demo will allow you to play the game’s prologue and opening chapter, up to the “showdown against first rival Altered,” although after defeating ‘Gauss’, you’ll be able to go back and explore the world, with some further side missions being unlocked. Set in a dark sci-fi universe, Outriders can be played with up to three other players and is a 'drop-in-drop-out' shooter, meaning players can join and leave without affecting the game.