Flutterby™! : Dream hacking through video games

Jake Gackenbach: Research Status Update and Dreams for Comment:

We wondered if this combination of less misfortunes and more aggression, when it occurred, would have an impact on nightmares. The answer seems to be yes. We found that gamers reported either fewer nightmares or, if no difference in incidence, they reported that their nightmares were fun.

And other interesting observations, summarized here as "video gamers can control their own dreams", likewise here.