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Game screenshot
Your rating: None Average: 4.3 (3 votes)
Year released:
[www].se [ftp].se [mirror].us [mirror].de (11.48 MB)
MD5: c2d64cd403c71e86c984319e283d1a45
For Mac OS X
Guides on emulating older games

From the Readme:

Zebulon is a new 3D arcade game for Mac OS X. It is similar in gameplay to the classic game Nebulus.
The game is very simple to play - your goal is to ascend a series of towers. Control your character with the left, right and jump keys set up in the configuration dialog. Press up to go through doors or to activate elevators. Avoid touching anything that moves.
Collect points for ascending the towers and for time left after finishing a level. Get an extra live for every 1000 points awarded.

You may also download this game from or

This is the latest version 1.1, minimum System requirement = Mac OS X 10.3

Registration code (enter without double quotes):
Username: "Powermax"
Code: "98765461"

Architecture: PPC


SkyCapt's picture
by SkyCapt - 2021, April 28 - 12:55am

Looks like the codename can simply be "P" or anything that begins with P.

IIGS_User's picture
by IIGS_User - 2021, April 27 - 4:51pm

Thanks to the person who added the registration code, this is very appreciated.

G4 User's picture
by G4 User - 2018, May 22 - 5:43pm

Registration code anyone?

SkyCapt's picture
by SkyCapt - 2017, April 13 - 8:38am

It does say "Nebulus" in the first line of description above, so credit is being given. I think Nebulus was the name they used on the Atari ST model. It took me quite a while to realize "Zebulon" is an attempt at pronouncing Nebulus backwards. I love one of Jonas other games: Reckless Drivin', and they say Jonas was very young when making these games. Top notch. Let's see that registration code.

Edit: Link to Reckless Drivin' has been added - IIGS User

G4 User's picture
by G4 User - 2017, March 4 - 9:01am

Please does anyone have registration code for this game. I am stuck on level 3 Sad

Excalibur's picture
by Excalibur - 2010, April 21 - 8:33pm

Being an avid Atari fan, I have to step in to add something here...
This game was also known as "Tower Toppler" for the Atari 7800 and Atari Computer systems.
Castelian, Kyorochan Land, Subline and Nebulus... all other names for the same great game on various systems in various locales.

IIGS_User's picture
by IIGS_User - 2010, March 14 - 10:15am

There is another Opensource port of Zebulon which is available for Windows, Linux and BeOS:
Its Mac OS X port is available at

IIGS_User's picture
by IIGS_User - 2010, February 27 - 7:06pm

The official website no longer holds this game, it is shareware:

If someone registered it in the past, please post registration code.