I'm almost positive 1 vs 100 will be going official next week or announced when it is going to go official. This means that you will be able to win arcade games, microsoft points, earn achievements, etc.
I was playing today and Chris Cashman kept saying that there is a big announcement next week so I immediately thought that they are probably going to announce a launch date. Apparently he slipped up and mentioned the announcement by accident during one of the episodes.
http://www.xboxic.com/news/5457








