The GOB file included is an episode of 3 levels for COOPERATIVE play. The levels were all tested intensively and no bug was found. It is (from my point of view) very neat, as it jumps to next level when missions are accomplished. There are about 10 new enemy types in the missions, new pup, new keys, and new weapons for enemies in the last level. Due to the various 3DO's in action, I strongly recommend to play this with no more than 2 players (3 only if host has a very fast machine).