The four character gameplay works surprisingly well, thanks to the ability to set the behavior of your teammates when they're controlled by the AI. You can have them attack immediately when they see an enemy or hang back and try to take them out from afar. This works extremely well, as you can map out a gameplan of sorts when choosing your teammate. I found that having ranged attackers like Cyclops and Storm blast enemies from a distance while Wolvie and Magma got their hands dirty was a smart technique, though I could have set it up in any way I desired. You can also tell your AI teammates when to heal, so you don't have to worry about switching to them while you're trying to deal with a large group of baddies.
The game also features a cool combo system, which gives you extra experience points for using your powers in conjunction with one of your teammates. They've all got different names depending on what you do, and while there's no exact count (a checklist would have been nice), I can tell you that there is definitely a lot of them, all with cool sounding names. For instance, shocking an enemy with Storm before sticking him with Wolvie's blades is known as an "Electric Claw", while Colossus' power-punching and Nightcrawler's teleporting kicks combine to form a "Catastrophic Flurry".
The only times the AI has problems is when they get stuck behind a closed door, or when they're trying to get on an elevator with you (someone always gets left behind). Unfortunately, this actually seems to happen to them more often than dying during actual combat. There are also a few painfully annoying occasions when a character will randomly fall to their death off of a bridge or, worse, will get knocked off when you try to squeeze by them. All of that hard work for nothing! Thankfully, you can either switch them out or pay (using "techbit", the in-game currency) to have them revived.
