With the latest Killzone: Mercenary update, all multiplayer maps can be played offline in Mercenary or Guerrilla Warfare modes, against up to 7 AI soldiers. As the game host, you will have control over the number of teammates and enemies joining you in battle. In Team modes, you can play with 3 against 1 for a quick kill, or take on an entire team of bots alone.
The update also removes some longer standing collision issues reported in the multiplayer maps. As such, the update will be mandatory for anyone wishing to play online multiplayer, with 23 MB required on the memory card to download it (549 MB if you've not downloaded our previous updates).