The last three games I played were Mirrors Edge, Dead Space 2, and my brothers copy of Portal 2.
That would mean that I am Faith, a runner, fighting necromorphs in Aperture Science.
I do not know about you guys and gals, but that sounds awsome. Especially if Faith gets to use the portal gun. I guess you could trick necromorphs into going part way through a portal and then disconnecting it to sever off limbs. Aperture is build with platforms and ledges, which are perfect for a runner to move around. Necromorphs could jump out of hidden areas and broken platforms in the run-down areas of Aperture. I would buy this game, and I would pay serious money for it.