Well I imagine even if you have a job, you're not rolling in cash, so I'll give some that are really good, but not too expensive.
-Fallout 3 GOTY Edition
-L.A. Noire (You play a cop, how could your family have problems with that?)
-Mass Effect 1 & 2 (if you care about story, its a good series. If not, don't waste your time, its a subpar third-person shooter)
-Crysis 2
-Halo Reach (there are a lot of Christian parallels there, if they ask)
-Left 4 Dead 2 (call it practice for The Rapture)
Just pointing out some games. Some are just incidentally more passable.