8. Planetside 2
Planetside was an underappreciated, massively multiplayer FPS that pit three futuristic armies against each other for total dominance of a planet. Players took on various military roles—as shock troops, engineers, pilots, and more—and backed up their companies, and batallions with whatever aid they could muster. The game was like a sci-fi Battlefield with many more players.
The experience is now set to return with the development of Planetside 2, which now offers a free-form character customization system, allowing players to soldier on according to their own taste. Battles will now last for days, or even weeks, and players will have to build alliances to accomplish long-term goals in their conquest of the planet.