Now yes I know I'm sort of stealing and sapping off another's (NGTM's) whole XCOM thing (but come on it is a pretty glorious game, sue me) but I've come across this mod which will certainly be a fantastic thing to try out (and it seems he's busy being productive so...)
We're used to a default squad of 4-6 soldiers going out into the field. This mod however, increase that to 12. 12! Holy **** that's awesome
EDIT: UNTIL SCOTTY RUINED MY DAY BY SAYING THAT THE TWELVE IS FOR VERY SPECIAL OCCASION Not only that but - "Eight soldier classes: Infantry, Assault, Sniper, Scout, Gunner, Rocketeer, Medic and Engineer, and eight MEC classes: Valkyrie, Marauder, Jaeger, Pathfinder, Goliath, Archer, Guardian and Shogun" while dealing with some difficulty things (ie, once you get awesome gear, you need to be suicidal in order to die basically) "Aliens and EXALT forces grow tougher over time, gaining stats and perks" (ie instead of stopping at lasers, EXALT will become well... plasma)
And of course, here's the grand one for you guys - "Soldiers rest after each mission, requiring the player to build a much deeper roster of soldiers" thus bringing in far more people at the same time.
So... who wants to save humanity or die trying? (Most likely die, these descriptions seem daunting on the challenge)
http://www.nexusmods.com/xcom/mods/88/?EDIT:
http://www.polygon.com/2015/3/1/8128715/happy-xcom-day-commanderIt's the birthday of XCOM!