1)Define this but I assume you mean cod1 health or cod4 health, in which case 1 is more realistic but 4 is funner (yeah, I said it). So lets go with cod4, you dont have to program in health packs

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2)no
3)no, yes. crysis' GUNS, not the suit.
4)Few factions.
5)Nope, all games are hardcore...ok ok c&c, thats not hard core >.>.
6)Once again, look at cod4, it has both...and crysis.
7)Never played either.
8)Yes, needs multiplay.
9)Both.
10)Different environments is nice.
Now the real reason I spent the time to answer that. Are you on ANOTHER project? What happened to the hundreds of others? Like your openoffice rip, or that software to stop theft of said software?