These are camps for adults and the activity was not scored. Playing by the rules didn't guarantee a loss — there were no winners or loosers among the non-traitors.
I think the major issue that sets the game apart from the mentioned board games is that players don't know there might be traitors. OTOH it's impossible to have the board game that way, since it would only work the first time it is played. However, the D&D campaigns are the same as our game in this regard.
Anyway, the game wasn't all bad, some teams told us that they had a great time and found it an interesting and uncommon experience. But since too many people struggled with it we've decided to not run it again.