If you don't find the helpscreen ingame then read this:
Q-W=switch weapon (in no regret you can also use the 1-0 keys to select one)
S= select an object around the silencer, press enter to pick up/use
G=Pickup every item around you
B=Detonate bombs that lay on the ground
V=Infrared vision to see infrared lasers
M=Use a medikit
E=Use energy cell
I-O=scroll left and right through inventory
U=Use active inventory item
STRG+D=Drop actual weapon (No Remorse)
STRG+L=Drop actual weapon (No Regret)
STRG+M=Change music track (if you like to)
STRG+Arrow keys=Roll sidewards and jump (no remorse) forward roll (no regret)
SHIFT+Arrow keys= Run forward or turn around quick
ALT+Arrow keys=Little steps sidewards or forward.
TABULATOR=Jump
I'm sure there are more but dont remember all now (I dont use all quick keys ^^ )
