Thanks Kriwan; I didn't know there was a way to play MWO with the Oculus until I saw your video!
MWO is actually a great game to play with the rift, since torso movement with the head doesn't change your movement direction; any other game with auto bound head aiming would make you feel sick as moving your head changed where you were going (I had this problem with GTAIV and TrackIR). MWO is also pretty playable with most of the HUD unreadable; Betty lets you know when anything particularly terrible is happening (ammo running out, critical damage, jump jet fuel is low), and all you really need to know is who to shoot.
To get this working, you need an Oculus, a 14 day trial install of TriDef 3d (http://www.tridef.com/products/pc), the TriDef Ignition beta (http://www.tridef.co...17438b00bacc842), the tridef oculus addon (http://www.tridef.co...php?f=24&t=3907). After installing, run ignition, add a new game profile of MWO, and launch MWO from the tridef ignition launcher. I had to turn my MWO to low details to get a playable framerate in combat (30+).
The hotkey menu for Tridef is on the numpad, so you'll want to unbind your MWO throttle hotkeys. Hit Num0 in game after launching into a match to bring up the menu, and use the numpad to navigate. With the following FOV settings, you should just barely be able to see the ready button in your peripheral vision when you load a game.
I had to play with the TriDef 3D settings a little bit to get them decent enough to be playable. The usable resolution on the RIFT is too low to make out any text other than large text in the center of your screen.
The settings that worked for me were performance quality high, 3d scene depth 5, HMD quality to high, HMD FOV override to both, 50 (output), 70 (game), 100 (safe). Pressing Num+ is a shortcut to switch to the "safe" FOV which lets you change to a usable FOV for aiming, while the 50/70 default FOV is good for movement and checking your HUD (enemy dmg indicator is visible at this FOV, for example). Your normal zoom which relies on FOV is basically made useless up by these FOV settings, so the safe FOV shortcut gives you back a ~2X zoom (extremely important since the rift is so low res!). Scene depth 5 lets you focus your eyes on the cockpit just by looking at it, and gives a slight 3d effect when you're focusing out of the cockpit.
In game, the oculus will roll with your head, and moving your head will move the mouse and torso. It's actually more intuitive than you'd think; since the mouse moves faster than the torso, the camera movement is somewhat dampened even if you move your head a decent amount. I ended up using the mouse for most aiming and movement and my head for small corrections and looking around. It's pretty awesome tracking an enemy mech with your head to keep a beam on target. The head roll tracking really keeps you from getting disoriented while moving your head, too!
The 3d is awesome and immersive, but I found myself basically debilitated when being hit by enemy fire and when explosions were going off. Missiles and lasers incoming and outgoing are awesome though! Situational awareness also feels a lot harder to maintain; not quite sure why, but I found myself having more trouble than usual getting into turning battles with nimbler mechs. You're also SOL if you want to keep an eye on capture status, objectives, HUD waypoints, ammo and weapon status, etc. If you want to have an awesome time shooting, however, the rift is for you! Just expect your ELO to go down for a while until you get the hang of it.