While the game was well received by critics, the PC releases of Eidos's popular Tomb Raider franchise overshadowed and crippled Treyarch's sales figures. In large part this was due to what are widely viewed as very difficult controls, challenging gameplay, and a steep learning curve for novice players. The official expansion pack Limb from Limb, released December 31, 1998, added another main quest for the single-player campaign, enhanced multiplayer through a selection of significantly more creative arenas, and introduced new playable characters such as the Minotaur.