Several video games based on the Magic: The Gathering franchise exist for multiple systems. Some have attempted to translate the card game to electronic play nearly exactly; others have taken more liberties and drawn more from the setting than the actual rules of the card game. Benefits of successful video game versions of the card game include convenience, practice, and challenge. However, artificial intelligence for a game such as Magic is an extremely hard problem, and such software usually must be continuously updated to stay current with recently released card sets. Video game versions often expand on artwork, and may include unique cards that rely on randomness, effects which would be difficult or annoying to duplicate in real life. Magic: The Gathering Named after the game itself, Magic: The Gathering was published by MicroProse in February 1997. The game takes place in the plane of Shandalar, where the player must travel the land and fight random enemies to gain cards, and defeat five wizards representing the five colors. The player must prevent any one color from gaining too much power, and defeat the planeswalker Arzakon, who has a deck of all five colors. Adventure game and role-playing game elements are present, including inventory, gold, towns, dungeons, random battles, and character progression in the form of new abilities and a higher life point total. Two expansion packs were published, Spells of the Ancients and Duels of the Planeswalkers. The game is notable as being the last game the esteemed game designer Sid Meier (Civilization, Railroad Tycoon) worked on while employed by MicroProse, though his involvement was short. Meier left before development was complete to found Firaxis Games. Magic: The Gathering: BattleMage Magic: The Gathering: BattleMage is a real time strategy game published in January 1997 by Acclaim for both PCs and PlayStation. It was also in development for the Sega Saturn, but this version was cancelled in mid-1997. In addition to the real time strategy game, BattleMage has a head-to-head mode. It is set on the continent of Corondor, where a planeswalker named Ravidel forces the most powerful mages to fight each other, so that he can eventually destroy them and conquer the land. The game had a poor critical reception due to its unfair AI, unfriendly interface, and unbalanced gameplay. Spectrum Holobyte filed a lawsuit after Acclaim published the PC version in January 1997, claiming Acclaim had violated an agreement