A good read about drug use and gaming from The Guardian:
"The coke sailed up my nasal passage, leaving behind the delicious smell of a hot leather car seat on the way back from the beach. My previous coke experience had made feeling good an emergency, but this was something else, softer and almost relaxing. This coke, my friend told me, had not been "stepped on" with any amphetamine, and I pretended to know what that meant. I felt as intensely focused as a diamond-cutting laser; Grand Theft Auto IV was ready to go. My friend and I played it for the next 30 hours straight."