High Quality Content by WIKIPEDIA articles! Oh No! More Lemmings (ONML for short) is a computer game expansion to the Psygnosis game Lemmings. Sometimes referred to as the "data disk", it contains 100 unique single-player levels and six new music tracks. The Amiga version also includes 10 two-player levels. This game is not the official sequel to Lemmings, a title that goes to Lemmings 2: The Tribes.