i think forum games are ok. Maybe the humor section could be excludeded from the new posts list though, as its not really relevant.
The only way to do this is updating to EzPortal 0.6.6 which allows admins to do so. However, by doing so, you would break the latest downloads on the front page, as well as replace the links in the Welcome user box with the avatar (linking to the buggy New posts from SMF rather than the custom one we use). Another alternative would be an admin taking the code from 6.6 and adding a custom PHP block with that code.
Also yeah Qwerty.55 if games are allowed entirely, that might be problematic because people will open Word Association, Count to 4000, ban the user above you, etc, which get quite spammish fast. Maybe limit it to certain elaborate games like the few currently active ones that aren't duplicates?