X-COM!!
'cause their they only ones I'd trust NOT to making a CRAP lousy stupid mess of it, as seems to be occuring with the so-called "XCOM" game coming out that's got jack squat to do with the original awesome games, blech! :/
yes, XCOM is unusual to mention in RPG, but why not? it was awesome envisioning of a great scifi story, with squads of soldiers, research etc that could all be blended inro great RPG action. It was strongly influenced by the "UFO" TV show, so it'd be perfect for RPG treatment
How many of ya back in the day got the creeps fighting those gawd DAMN chrysalids in the dark city areas, eh? hehe

Hated those buggers, before you knew it half yer squads infected and zombies are everywhere
Or swore out loud in RL as you heard the unmistakable sound of a blaster bomb being launched, yer jaw dropping as the blue trialof death flew across the screen and you knew all your carefully hoarded/trained squad was gonna get vapourized? (was a great weapon in game, "smart" wepaon, you could set way points for the mini-nuke missile to fly along)
so much could be done with that game,
-more espionage (spy on corrupt/taken over politicians, sue funds ot set up surveillance like ECHELON etc)
-make your bases in 3D (build sentry guns etc to defend 'em)
-more stuff with your squad members like a video clip of them as a perosnal profile so they mean more ot you
-could make it have DLC, each part of the game is one country or region, with their soldiers/special forces/agents, ie, USA/Canada/Mexico, EU, Russia, China etc
-Will you rescue citizens at "terror sites" and perhaps gain valuable info, or vape them to stop spread of alien infectors (is your team bloodthirsty or more humanitarian? have "morals" and "persuasion/psychology" as a "stat"?)
etc etc
