But the problem with AT1:BT is that I already have MW:3.
Also, AT1:BT has an issue, where whenever I find something awesome and go to use it, my game crashes.
It may be more advanced, but that's pretty much just because it's a faithful copy of a 20+ year old tabletop game, which, while one of my favorites, doesn't always copy over to a digital medium well/faithfully (coughmechassaultcough).
AT1:BT is okay, but it's really in need of some bug correction.