Nebulus is a computer game published by Hewson in the late 1980s for various home computer systems. International releases and ports were known by various other names, including Castelian, Kyorochan Land, Subline and Tower Toppler.
The game's original 8-bit release came to some critical acclaim, in particular the Commodore 64 release, which garnered a Gold Medal award from UK magazine ZZAP!64. Nebulus was followed by a lesser-known sequel, Nebulus 2, on the Amiga and Atari ST in the 1990s.
Nebulus is a platform game with some distinctive unique features. The player character, a small green creature called Pogo, is on a mission to destroy eight towers that have been built onto the sea, by planting bombs at the towers' peaks. Pogo's progress is hindered by enemies and obstacles, which he has to avoid in order to reach the top of the tower.
The actual game play happens at each tower in turn. Pogo starts from the bottom and has to find his way up to the top. The towers are cylinder-shaped and have ledges on their outside, either horizontal, forming stairs or connected by elevators. Because of the cylindrical shape, the towers have no "left" or "right" edges, instead allowing Pogo to walk all around the tower.
A graphical innovation, and perhaps the most notable feature of the game, is that when Pogo walks left or right, he always stays in the centre of the visible screen. Instead of the Pogo sprite moving, the tower behind him turns clockwise or counterclockwise with a convincing sense of depth. This was featured favourably in reviews of the game.
Along his way to the top of the tower, Pogo encounters many different enemies, mostly shaped like basic geometric shapes. Pogo can shoot some of the enemies, while some are impervious to shooting. Contact with an enemy knocks Pogo down to the ledge below. If there is no ledge below, Pogo falls into the sea and drowns.
Once he has reached the top of the tower, Pogo needs to enter a door to trigger the tower's destruction mechanism. After that, the tower crumbles to the sea. Pogo then boards his submarine and enters a bonus stage (in some platforms, but not for example in the ZX Spectrum version), where he can shoot various kinds of fish to score bonus points.
Releases and ports
The game was originally released by Hewson for the ZX Spectrum, Amstrad CPC, Commodore 64, Commodore Amiga, Atari ST and Acorn Archimedes. There is also an unfinished version for Atari XE/XL computers. The same month the game was released, a demo was due to appear on the Zzap!64 magazine cover cassette. However, due to a mastering error, the full game was provided instead of the demo, giving all Zzap!64 readers a copy of the game free of charge.
The US version, which was published by U.S. Gold, was released under the title Tower Toppler. The Nintendo versions were released as Castelian, in which the character is called Julius. The Game Boy version of Castelian was developed by Bite Studios and released in the United States by Triffix and in Japan by Hiro Entertainment. The Italian version was called Subline.
In 2004 it was re-released on the C64 Direct-to-TV. On June 20, 2008, the C64 DTV version made its comeback on the Wii's Virtual Console download service in Europe on June 13, 2008 and later in North America on May 4, 2009. Versions for the Nintendo Game Boy, Nintendo Entertainment System and Atari 7800 were also released.
Computer Gaming World gave the game a positive review, saying, "Between delightfully benign game play ..., clever obstacles (though none are very difficult to figure out), and lively animation, you will have a great time with this game. Well, maybe you won't, but I will".
- Tower Toppler at MobyGames
- Toppler - a very accurate Nebulus remake
- GP2X Port
- Nebulus at AmigaMemo.com - AmigaMuseum
- Nebulus at World of Spectrum
- Castelian at GameFAQs
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