Nebulus

Nebulus is a vertically scrolling platform game created by John M. Phillips and published by Hewson Consultants in the late 1980s for home computer systems. International releases and ports were known by various other names: Castelian, Kyorochan Land (キョロちゃんランド, Kyorochan Rando), Subline, and Tower Toppler. The player climbs a cylindrical tower studded with platforms. The tower rotates as the player moves horizontally, giving a 3D effect.

The game's original 8-bit release received some critical acclaim, in particular the Commodore 64 release, which garnered a Gold Medal award from UK magazine Zzap!64.

Nebulus was followed by the lesser-known Nebulus 2 for the Amiga in the 1990s.