Raid Mode, which was first introduced to the series in the original version of Resident Evil Revelations, sees gamers play online in co-op mode or alone in single player, taking on the hordes of enemies across a variety of missions whilst levelling up characters and earning weapons upgrades. Players are taken back to the events that took place between Resident Evil 4 and Resident Evil 5 and reveals the truth about the T-Abyss virus. Resident Evil Revelations features series favourites Jill Valentine and Chris Redfield, plus respective BSAA partners Parker Luciani and Jessica Sherawat. With limited ammo and weapons available, the race is on to survive the horror of Resident Evil Revelations.