Curse my gosh darn insatiable curiosity

There's several WH40K games that cover different power levels (much the same setup as Fantasy Flight's Star Wars stuff, only less compatible.

In rough order of power level, they are:
Rogue Trader is essentially street-level civilian stuff.
- It is, in my opinion, the most interesting, but also the most deadly.
Only War is for soldiers in the Imperial Guard.
Dark Heresy lets you play an acolyte, but make sure you use 2.0, cuz 1.0 is a hot mess.
Black Crusade is for servants of the Dark Gods.
Deathwatch is for elite Space Marines.

If you run Rogue Trader, let me know, I'll hop in.