Mechwarrior Online
Free2play game, still in beta. A tactical BattleMech simulation set in 3049 AD. As a pilot known as a "MechWarrior", you are about to take control of the most powerful mechanical battle units the universe has ever seen.MechWarrior Online puts MechWarriors into a first-person, team-based, tactical battlefield where the victors swim in the spoils of war and are rewarded with the almighty C-Bill (in-game currency)
In one word: Hackable!