no catch at all, just some fun.
check
http://www.gateway.com/country/promotions/challenge/ind...
for details. Just register a name, go into the store, login and play! anyone in the top 25 wins a g4f ti 4600, which would be awesome, but it is really hard. I think you have to get under a minute now to break the top 25. (killing 12 guys, see site for details.)