It forever changed: The very nature of console first-person shooters. It might seem a bit weird to say now, in this Call of Duty-saturated world we live in, but there was a time when the very idea of a first-person shooter on a console was laughed out the room. "How would you aim? With those little analogue nubs?! Pahaha!"... and so on, but Bungie relished the challenge. It's not as though console shooters hadn't been done at all, but when Halo landed and you were taking up arms inside the passenger seat of the four-by-four Warthog with your buddy driving you both into a horde of terrified Grunts, well, there are few things as genre-cementing as that. Halo 2 would take the series online and redefine the multiplayer component in a way not seen since Counter-Strike, and although 2 and 3's releases became justifiably huge world events, it was Halo's first gulp of the cherry that nailed everything right out the gate.