Like Telegraph, Fallout 3 is my drug of choice. It's almost cartoonlike how some enemies explode in various ways when using certain weapons and coupled with the humour often seen in the details of the location around you, there's a chuckle a minute.

I also find rampaging in GTA style games has a similar effect, especially when trying to jump off a car onto another, setting up a pile of cars for a mass explosion and other random things I think up. I spend more time screwing around in those games than I actually do playing the main storyline or intended sidequests.