Matt of TD Guerrilla Cambridge announced on the Killzone forums that Killzone: Mercenary is getting two free maps as part of today's update.
The update to the game was made available at 7 a.m. ET today, and it requires 167 MB of free space on your PS Vita's memory card. The two maps included in the update are "Tharsis Depot" and "Blood Gracht" — both remade from the multiplayer of Killzone 2.
Tharsis Depot is a subterranean mining platform that has been converted to process nuclear Petrusite. It's a good map to play Guerilla Warfare or Warzone on. Blood Gracht is set in the most ruined but recovering city of Pyrrhus. It features suburban buildings, winding alleyways and canals.
Make sure to check out our full review of Killzone: Mercenary, which released on the PS Vita last September.