Well even though I've ACED every biology class I've ever been in (or could have if I'd applied myself), I've learned a lot about body parts and organ placement from the FPS I play (Thanks GoW for showing me the exact placement of the oxipetal lobe [on the inside AND outside!]).
Also, apparently EVERY SINGLE MEDKIT EVER IS COMPLETELY DECKED OUT TO FIX ANY WOUND AND THE USER CAN ALWAYS HEAL HIMSELF EVEN AFTER HEADSHOTS OR LOSING AN ARM (every game w/ medkits)
Finally, when on the battlefield, even the beefy man wearing (what looks like) 2-inch (at least) armor can be shot and killed by bullets to the chest (where the armor is) AND if youre playing execution, apparently everyone has a heart defect that causes them to have a stroke if theyre hit by a bullet; plus thier blood will literally GUSH out of the skin of thier legs like thier hemophilic or whatever even though they dont have so much as a minor scrape (thats visible) (GoW again)
P.S. I LOVE GoW and I think it is a shining example of an implemented cover system and if any other game copies it, puts in a CoD-style class sysetm, shamelessly rips of the theater and forge aspects of Halo (but nothing else from Halo besides maybe the whole Marines Vs. Covenant stuff) and can even slightly improve any of those things while keeping it balanced and adding in one or two cool elements (Coop Duh!) then I will A) Crap my pants and immediately buy it B) Play it once C) Die instantly afterwards a happy happy man