I'm Sorry?
"Genre-defining"?
What genre is that? THe one QUake and Doom started, and was then revolutionised by Half-Life?
Or the sperate one that Halo: Combat Evolved resides in? H:CE beginning life as an open ended world with wildlife and interaction and ended up as a console-ised copy-pasted, generic, bland shoot-hide-repeat-fest.
Seriously, the codex level.. how did everyone not feel like they had been utterly ripped off? It was teh SAME LEVEL REPEATED 5 TIMES.
I had to make my own pleasure in it by, in a level where you open a door and the enemies run and jump on the flying bike things, reloading about a squillion times until I managed to headshot each enemy and steal their bike. Skipping a whole section of the level. Great fun. Completely unintended by the developers. For obvious reasons never played 2 or3, and yet my definition of "FPS" is still perfectly intact.
Anyone that's interested in a really enjoyable game check out Star Wars: Republic Commando on Steam. Cheap and fun.
Over to you fanbois (i won't be reading this thread again anyway)