Take 3 games...

[Orcus The Ultimate]

Beyond Good & Evil + Psychonauts + Mcgee's Alice

or

Deus Ex + XCOM + (any of those above)

i wonder what it could turn out to be...

 

[cgentero]

Metal Gear Solid 3 + Ico + Resident Evil 4

Outdoor environments, Stealth\Evasion focus, Large scale platforming, Long periods of escorting, Survival elements, Semi fixed camera(with the ability to pan, zoom, and switch angles)

 

[Gurk]

Oblivion + BioShock + Minecraft.
This sounds delicious.

 

[Lt. Vinciti]

Fallout New Vegas
+
Fallout 3
+
Elder Scrolls V Skyrim
=
Fallout 4 ;P

 

[Jdb]

Monster Hunter + Ikaruga + Sin and Punishment 2

An online four-player coop bullet-hell shoot 'em up. Team up with friends to defeat giant space dinosaurs! Upgrade and change your ship with enemy parts! Tackle ship and on-foot missions! The screen's scrolling perspective changes! Amazing!