 The gameplay remains unchanged from the base game, which is not required.First released as "Xmas Lemmings" as two four-level demos in 1991 and 1992, there were two later full retail releases on the Amiga and Atari ST in 1993 and 1994, both with an additional 32 levels.The games were well-received; Rob Mead of "Amiga Format" described it as "funny, frustrating and incredibly addictive", despite being disappointed by the number of levels, and Will Greenwald of "PC Magazine" ranked it among the best Christmas video games in 2014.