There's a video of Deep Down available, watch in in 1080, you can definately see that it's too ugly to be a CG (shadow failing near ears, kind of ugly textures here and there and more importantly you see it's modelized by looking at round things) yet IT4S FUCKING BEAUTIFUL. So no it's not In-game, but it's In-engine and that's more than enough. Infamous is also in-engine, for the same reasons as above, check the 1080p, especially on the two guys we see from the behind and the girl. Too ugly and imperfect to be CG, yet so beautiful.
KZ is deffo in game, since it's, well, in-game and playable...








