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FortApocalypse

The original Atari 400/800 6502 assembly code for the classic game Fort Apocalypse.

Install / Use

/learn @heyigor/FortApocalypse
About this skill

Quality Score

0/100

Supported Platforms

Universal

README

Fort Apocalypse

The original Atari 400/800 6502 assembly code for the classic game Fort Apocalypse.

This is mainly being released for historical reasons. This requires a copy of SynAssembler to assemble.

Fort Apocalypse

Notes

Files:

LEVEL.1P	Level 1. Pre ship.
LEVEL.2P	Level 2. Pre ship.
LEVEL.1N	Level 1. Shipped.
LEVEL.2N	Level 2. Shipped.
fnt1.s		Fort font 1. Alphabet.
fnt2.s		Fort font 2. Graphics.
fort.s		Main
fort1.s		Game logic, setup
fort2.s		Movement for pods, missiles, tanks, hyper chambers
fort3.s		Chopper logic, robot brains
fort4.s		Sprite logic, read joystick, draw map
fort5.s		Sound generation, sprite updates
fort6.s		Data, shapes, display Lists
fort7.s		Variables
fort8.s		Display list for navitron

Level map format is:

Bytes	
0-1		header ID, not game related
2-3		address to load, not game related
4-5		length of data, not game related
6		color1
7		color2
8		color3
9		color4
10		color5
11-EOF	level data. each byte represents a character to use
		from the font.

Screen size is fixed to to 4 screens of 40 character wide.

Sounds:

These were generated by pulling out just the code used to generate them and run on an emulator, then captured in all its 8-bit noisy glory.

All in the sound_effects folder

fort_chopper.aiff			The famous chopper sound
fort_cruise_missile.aiff	Firing of a missile from a tank towards the player
fort_explosion.aiff			The mega explision of the Fort Apocalypse
fort_hyper.aiff				The Hyper Chamber sound when activated
fort_missle.aiff			Firing of a missile from the players Chopper
fort_refuel.aiff			The refueling sound

License

Fort Apocalypse © 1995, 2007, 2015 Steve Hales.

A license is given for this code under the following terms:

Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. NonCommercial — You may not use the material for commercial purposes. NoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Full License text:

Attribution-NonCommercial-NoDerivs 2.5

CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE LEGAL SERVICES. DISTRIBUTION OF THIS LICENSE DOES NOT CREATE AN ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES REGARDING THE INFORMATION PROVIDED, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM ITS USE.
License

THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTECTED BY COPYRIGHT AND/OR OTHER APPLICABLE LAW. ANY USE OF THE WORK OTHER THAN AS AUTHORIZED UNDER THIS LICENSE OR COPYRIGHT LAW IS PROHIBITED.

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GitHub Stars84
CategoryDevelopment
Updated21d ago
Forks11

Languages

Assembly

Security Score

80/100

Audited on Mar 12, 2026

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