For those of you with Unreal Tournament....
Might I recommend
Infiltration?
This is a EXTREMELY realistic mod for Unreal Tournament. You select your weapons loadouts (and the heavier the loadout, the slower your character moves, becomes unable to jump, etc.. )
There's also mods to make it even MORE realistic, those that won't allow you to carry quite as many guns as the default infiltration settings... (In Default Inf, you can carry as many guns as you have 'budget' for, but the trade off comes in speed, like I said.... that and trying to decide what gun to wax a given opponent with. )
I especially like the realistic reloading animations. If you shoot your M-9 dry, you can choose to drop the magazine, slap in a new one, and hit the slide release, OR you can draw another weapon, take out your enemy, then draw the M-9 and reload (when you holster an empty pistol, your character releases the slide forward, before holstering. Upon reloading this weapon, your character actually goes through the motions of loading the mag and racking the slide, it's VERY cool. )
It's REAL cool to set up a server with 1 spawn per person.... and since it only takes 1 well-placed round to kill, it makes things VERY interesting.... like an earlier game where I was being pursued by 3 guys (I was the last alive on my team, )
All I had left was 1 1/2 magazines for my FN P-90. Obviously, I wasn't gonna get them at range, so I limped into a building and proned facing the door. The first mook through got zippered from crotch to sternum. Fortunately, I stood up and limped away, because the second guy primed a grenade and introduced it to the room I had been in (I still caught a couple of frags from them bouncing around, ) He peeked around the corner in time to catch a burst to his face... Like an idiot, I just waited for the 3rd guy to poke his head around the corner.... Right up to the point the 3rd guy snuck up behind me and introduced a knife to the back of my head. (I'd forgotten about the BACK WAY into the building I was hiding in.. ) Ah well...