Supaplex

Supaplex is a computer game created by Michael Stopp and Philip Jesperson of Dream Factory that is an extended clone of Boulder Dash. Though originally designed as a version of Boulder Dash that could fit onto a floppy disk, the designers abandoned this approach in order to create better graphics. The game comes with 111 levels though many unofficial level sets have been released that greatly increase the available number of levels.

The levels must be played in order, however, the interface allows up to three levels to be skipped. If such a level is solved at a later time, a new level may be skipped instead. The game is very hard, but unlike many Boulder Dash-related games the difficulty comes from the puzzle design rather than from semi-responsive controls.

While most objects are identical to those in the original Boulder Dash, Supaplex introduces a variety of explosives (shaped as floppy disks) that the player must use. Orange disks work like rocks, but explode when hit or when falling. Yellow disks do not fall, can be pushed in any direction, and explode when the trigger is hit. Red disks can be carried and dropped when convenient, exploding seconds after.

Supaplex is the first BD-like game that isn't fully grid-based: while the playing field is an obvious grid, the objects do not "snap" from one grid position to another, but can be halfway or "in between" grid positions. This behavior has led to a number of well-known bugs that can be turned to the player's advantage, many of which need to be exploited to complete fan-made levels. For instance, by turning around quickly, the player can cause an enemy or rock to 'bounce' off him.