Cooperative mode features a separate campaign mode set in 1952–53 in the gap in the time line of the single-player campaign. The cooperative campaign supports anything from two to eight players, taking the role of a special forces group called "Spectre Team". Players are tasked with many randomized objectives around the map, while defeating hordes of Chimera in the process. The strength of the enemy forces is altered based on the number of players and their skill levels. There are three classes to choose from: Special Ops — long-distance damage dealers, who also provide ammunition; Soldiers — the "tanks" who endure the most damage; and Medics — who drain life from enemies and impart to teammates. Competitive mode features support for up to 60 players during the Skirmish mode; which allowed for the greatest number of players in an online PlayStation 3 game at the time of release, but was last surpassed by "MAG". Five games modes are available: Deathmatch, Team Deathmatch, Core Control (Capture the Flag), Skirmish, and released via update, Meltdown. Skirmish has players getting split up into squads of five and take part in objective-based proxy-battles. Players can play as either the Humans or the Chimerans (but due to updates, the player can now be a Cloven, a Female Ranger, or a Ravager), and get to choose their weapon loadout before and during a game while respawning. Many weapons make a return from the original, most notably the Carbine, Bullseye, Fareye, Auger, Rossmore and LAARK (although this can be only accessed through a berserk). However, the Arc Charger and Dragon did not return, and were instead replaced with the Bellock, Wraith, Splicer and Pulse Cannon. The addition of berserks is a new feature, and can only be accessed if the player reaches a required XP during a game through kills. The berserks give players an additional advantage such as a new weapon or added health but only for a short period of time. There are a variety of campaign based maps featuring maps of different sizes (10p, 20p, 40p, 60p) with the player choosing their preference. Custom games also made a return, although unlike "Resistance: Fall of Man", players cannot receive XP in custom games. The ranking system is also identical to that of "Resistance: Fall of Man", with players progressing through 20 ranks with three tiers each from private up to supreme commander (making a total of 60 ranks).