Working on Battlecode was the same way for me, most intense time I've ever spent at MIT. Lots of teams were really into it which made it all the more competitive and fun.
In 2009 one of our rivals was a solo coder who was in the top 8 of the previous year (we became friends through the competition and still hang out to this day). He relayed to me a story of how one of the other teams had tried to sabotage his efforts. They sent a female member of their team over to his room to convince him to drink with her. It didn't work, although that was mostly because he already liked to drink and code.
In 2009 one of our rivals was a solo coder who was in the top 8 of the previous year (we became friends through the competition and still hang out to this day). He relayed to me a story of how one of the other teams had tried to sabotage his efforts. They sent a female member of their team over to his room to convince him to drink with her. It didn't work, although that was mostly because he already liked to drink and code.