Gloom is an atmospheric team play modification for Quake II that puts humans against a team of alien spiders. The object of the game is to obliterate the opposing team by killing their troops and destroying their spawn points. Each team has six classes which can be bought with frags earned, as well as two base classes. The depth of Gloom lies in the radical differences between its teams as well as the versatility of the builder classes that have the power to make every game truly unique. The fun of Gloom lies in using teamwork and class advancement to dominate each game.