I didn't see any topics about Planetside 2 here, so I figured I'd start one. For those unfamiliar with the game, Planetside 2 is a recently-released free-to-play sci-fi MMOFPS featuring large-scale battles across three massive continents.
There are three factions: the Terran Republic (authoritarian empire dedicated to restoring order), Vanu Sovereignty (technocratic fanatics obsessed with collecting alien technology), and the New Conglomerate (freedom fighters and their mercenary friends). There are 6 classes and 7 vehicles per side (some vehicles are faction-specific) which the player can swap between at bases.
I've been playing this game casually since CoH closed and I've found it to be quite fun. The game's biggest strength is that the battles are huge and often involve hundreds of players. Each continent is continuous (i.e. one instance), so after capturing or defending a base an army often advances or retreats to another base (and firefights between bases are some of the best firefights, IMO).
Here's a screenshot of Indar's map; the colors denote who controls what sector at the time when I took it and the explosion icons indicate where battles are taking place (one can air drop into a battle).
Edit: Please note that this is an old screenshot and the new map is a little bit different.
The main critique I'd give this game is that weapons take a very long time to earn enough "certs" to unlock and upgrade (and the cash shop prices are a bit high), leading to some balance issues since many players don't have much unlocked beyond the stock equipment.
Still, the game is fun overall and I'd recommend it to anyone looking for a good large-scale FPS.
Some screenshots