The main online mode contains 8 maps on the disc with several new maps that can be added through DLC. All the maps are set in Cybertron and feature up to 10 players. I never really got tired of the maps and enjoyed all of them.
You have 6 multiplayer modes to choose from during the main competitive online mode. You have your basic Deathmatch which is a free for all kill fest. Team Deathmatch pit’s the Decepticons vs. Autobots and whichever team gets the most kills is the winner. Countdown to Extinction is a mode where you have to snatch a bomb and plant it in a limited time. Power Struggle is a mode that is vary comparable to your basic King of the Hill game.
My two favorite modes are Code of Power and Conquest. Code of Power has you vying for a giant melee weapon in short 2 minute rounds. Conquest is a capture and hold style game mode. In Conquest you have to obtain and protect nodes. I spent 90% of my online time in Conquest. It was the most exciting and challenging game mode in my opinion. By the time I was done playing the game in the late summer of 2010, I was ranked 6th in the World in Conquest!