Super 3D Portals 6
is a bootleg demake of Portal for the Atari 2600! Unlike some demakes, this is actually programmed for play on a real Atari 2600 or emulator, making it completely accurate to the system specs.
-two portal gameplay
Super 3D Portals 6 uses a unique two-joystick control scheme to be more faithful to the original portal while still conserving the Atari's limitations.
Joystick 1 Left/Right: Move Left/Right
Joystick 1 Up: Jump
Joystick 2 Left/Right: Aim Counterclockwise/Clockwise
Joystick 1/2 Fire: Fire Red/Blue Portals
revision 27: initial public release
revision 28: 4 new levels added
revision 29: 2 new levels added, name change
revision 30: title screen music changed, some bugs fixed
final revision: major bug squashed, filling cartridge to near limit
DOWNLOAD (final revision - binary, basic source, assembler source included): http://webspace.hinchy.us/super3dportals6_final.zip
You'll need an emulator to play it. I recommend Stella
POSTED ON KOTAKU! - http://kotaku.com/5048537/portal-ported-to-the-atari-2600