A simple arena, in principle... but play it for a little while, and you might change your mind. The hill is accessible via 5D passageways from the outer ring... and you come out on the far side from where you started. Big weapons are on the hill, everything else is in the pit surrounding it... and to make matters a bit more complicated, 3x canisters can be found in sort of hidden corners (we found ourselves shooting at them just out of principle... you never knew when someone would be in there). Adds up to serious carnage, with anything more than 2 players.