While the single-player experience is a great tale with an epic scope, it is equaled, and perhaps surpassed, by the multiplayer modes, which are perhaps some of the best I've ever played, and I'm particularly picky about my multiplayer. The first mode that's included is a cooperative mode, which allows up to 8 players to leap into a game and explore the world of Resistance 2. However, you're not playing as Nathan Hale or as one of his Sentinels. Instead, you're part of the Spectres, a separate military faction tasked with tracking down and finding Gray Tech, items held by the Chimera around the world. The co-op mode missions run parallel to the action of the single-player campaign, and help to point out that Nathan isn't the only one that's fighting this war against the Chimera; other humans are risking their lives trying to defeat the invaders as well. (Incidentally, Gray Tech is also vital because you'll be able to use these items to unlock additional missions as well as gear that can be used to outfit your characters.)
Players are given a choice between three different classes, each with their own abilities and traits. However, players aren't restricted to a particular class, and can switch at any time they wish, including during a match. The Soldier is the tank of the squad, equipped with a chain gun that projects an energy shield and packs more health than any other class. Spec Ops are the damage dealers of the group, and while they have less health than others, their Marksman is particularly effective in wiping enemies out. They are also the only class that can resupply soldiers by throwing out ammo packs. Medics are the final class, using their Phoenix weapons to drain the health from enemies and convert it to healing blasts from their weapon. They can also resuscitate party members faster than any other squad. Based on the class chosen, players receive experience points depending on how well they perform the functions of their class. This means that while everyone can receive XP for damaging enemies, soldiers will gain more for protecting troops, spec ops will gain more for resupplying troops and medics will gain more for reviving fallen troops. These points are important, because points will eventually translate to higher rankings as well as unlocking new weapons and Berserk powers.
Berserks are specialized abilities that are tied to a particular class, and can be triggered when a player has gained enough experience points to fill a meter, which will slowly drain when the power is active. For instance, Soldiers can trigger Ironheart, which will reduce the amount of damage taken as long as the Berserk is active. The Ring of Life, by contrast, allows Medics to set down an area that will constantly regenerate health of any allies in its proximity. If a player frequently performs their job, they'll continually refill this meter, allowing them to try to swing the tide of the battle in their favor. That is an extremely important factor when it comes to the co-op mode, because the game takes a dynamic approach to play. Initially, you'll be given an objective and based on how you're doing, the levels of each class in your party and the number of players in a match, the game will scale the action accordingly.
For example, if you find yourself playing a split-screen co-op game with one friend, fights will be easier than if you move in with seven other players and are surrounded by sixty enemies or more at the same point. But on top of this, you'll also discover that the objectives will dynamically change as well, making each situation play out in a different manner every time. What's more, as you blast through each checkpoint, you'll inevitably go up against some elite versions of these creatures, each of which hold more health than a standard Chimera and can inflict more damage as well. But even outside of the scaling action of the cooperative play, the mode truly embeds a sense of working together with the other players in your squad, because it's not possible to survive this mode by going commando. Each player is forced to rely on the other skills of their party mates to survive, but the one thing that I've found in playing a number of multiplayer matches is that anyone, from a newcomer to a seasoned veteran of the mode easily falls into a specific role and gets a hang of the gameplay, making it one of the most accessible multiplayer modes around.