presence of rule-breaking cards, players are encouraged to use unfair tactics against others, to act mercenary to further themselves at the expense of others, or to use cheat cards to affect outcomes (such as fixing the roll of the die). Throughout a player's turn, others are free to intervene: they can passively buff or debuff the player or monsters to alter the outcome; play monster cards of matching types to make the battle more difficult; or offer to assist the player, typically in exchange for treasure cards. Other cards that can enter play include Items, which can be used in combat, Treasure Cards, which act as sellable loot and equipment, and Curse Cards, which apply effects. Additionally, players can equip certain cards (such as armor and weapons) to raise their total level and kill stronger monsters, and can use Class Cards and Race Cards to grant extra abilities or advantages at the cost of a balanced weakness; for example, the elf race can level when helping others kill monsters, but will take additional damage from disgusting enemies. Standard games typically last around an hour, with the game ending once a player reaches the target level and wins the match. Aside from defeating monsters, players can progress through indirect means such as selling cards (with every 1000 Gold on the sum total granting a level) or by playing special leveling cards. Most games disallow victory through indirect methods, meaning only fighting a monster can win the game. There are a few exceptions, however, such as when a player uses cards that specifically state they override rules. Variants, lite editions, expansions and accessories Variants These are themed "box set" editions of Munchkin that have been released. (The overall theme parodied by each set is after the title.) Each is a stand-alone version that can be played separately or combined with any other version for a more expansive game. Most of these editions were illustrated by John Kovalic, although some were done by other artists (who are noted if applicable). Some of these have been released in Deluxe versions (which include a gameboard and movers to keep track of levels) and/or Guest Artist Editions (drawn with new art by artists other than those who originally drew them). Certain versions have been co-produced with USAopoly and/or IDW Games, and feature "character cards" that grant starting powers and keep track of levels. These games are