Transformers: War for Cybertron has an actual, Call of Duty influenced online mode that shockingly, is quite good. It is class based with each class having its own abilities, weapons and vehicle mode. The Scout can cloak, use both a shotgun and the sniper rifle. They transform into very quick moving, machine gun packing cars. Oh, and if you sneeze on them, they die. Yup, each class has different health bars. The Scout only has 4 bars of health.
Now the Soldier, the bulky longest health bar in the game minigun packing tank (no really, they turn into tanks) is my least favorite class. They move soooo slow and with the exception of the minigun, their weapons are horrible.
The Leader is front line support with heavy, explosive weapons. Buff allies, shield allies and blow the crap out of things with grenades and a high powered ion cannon. Like Optimus Prime, they turn into trucks. I also hate this class. Again, slow, unwieldy and my aim is horrible with that Ion Cannon.
The Scientist, widely considered to be the weakest class with a health bar of 3 blocks, can be killed by being looked at funny. They turn into Jets, can fly (or hover really), heal allies, spawn a defensive sentry or, my personal favorite, disguise themselves as a Scientist on the enemy team. In a great touch, the Autobot/Deception emblem does NOT change. Easily the best part of multiplayer is disguising yourself, weaseling your way in close to an enemy, and blowing them away in one shot with the EMP shotgun. Your not invisible, so you have to play the part and "hide in plain sight" in order to succeed. The playstyle required is unlike anything, outside of course of the Spy in Team Fortress 2. Even then, the spy had to backstab someone, the Scientist?
Shotgun to the face. Much more satisfying.
Sadly Tranformers uses the Gears of War 2 ranking system. Halfway to level 25 is level 18. Yup. I'm going to spend a very long time playing this game in order to max out each class.