The 8 player co-op mode of Resistence 2 was great. You had about 8 maps each with a number of different objectives and each game would randomly choose 4 objectives out of the available ones. This kept it fresh for a long time with all the possible permutations. The last objective always featured a boosted boss battle in line with the objective you're currently at.
You had 3 classes, soldier, medic and engineer. The soldier had a shield everyone can hide behind, healer obviously heals and could drain the enemies health, the engineer had the sniper rifle, explosives and provided ammo for everyone. Everyone could revive downed team mates, but the medic could do it twice as fast.
You could level each class up to lvl 40 unlocking extra abilities and weapons. You would fill a bar while scoring points for actions specific to your class to unleash your special ability when you want. For example invisibility for the engineer and reflective shield for the soldier.
There were lots of fun weapons in resistence 2. It's the only online multiplayer fps that has held my attention for more then a week. Hopefully resistence 3 will have the same or improved online co-op.
