OK thanks for clearing that stuff up. English is not my primary language so I only had translation sites to look at and those aren't that good.

Deregulate: I suppose he could use deregulate on Harry's gun to make it malfunction temporary.
Decoupage: after your explanation I think that's something you could use on Harry as long as Harry can get out of it somehow.

About demoralize: yeah, I don't know what kind of effect that would have on Harry... make him completely without scruples like the primary antagonist Zoran Lazarevic in the game or make him into a good guy?