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Super Octogon
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About the game
Super Octogon is a reflex game reduced to almost nothing: an octagon, a dot on its outer edge and walls that keep coming. Segments of wall appear in the middle and slide outwards along the eight sides. You can only move around the rim, left or right, and the moment a wall reaches the spot where your dot is, the run is over.
The walls arrive in patterns, picked at random from a set, so after a while you start to recognise shapes and the gaps to slip through. The game counts the waves you get through and shows the number when you crash.
Playing it here
Super Octogon is a CHIP-8 program. CHIP-8 is a simple virtual machine from 1977, created for hobby computers like the COSMAC VIP, and people still write new games for it. This one targets SUPER-CHIP, the later extension that adds, among other things, larger 16 by 16 sprites, and was made for Octojam 8, a yearly CHIP-8 game jam. It runs here in the Octo emulator, with the speed and colours chosen for it in the archive.
Click Play and press A or D to start. F2 saves the state of the emulator at any moment and F4 brings it back. A gamepad works too: left and right on the D-pad move the dot.
Controls
| Key | Action |
|---|---|
| A or left arrow | move around the rim one way |
| D or right arrow | move around the rim the other way |
| A or D (title screen) | start |
| Any key (after a crash) | play again |
| F2 / F4 | save / load the state |
A few things worth knowing
Look at the gap, not at your dot. Find the opening in the next wall first and then head for it; reacting to the wall next to you is usually too late.
Hold to keep moving. Holding a key carries the dot steadily around the rim, so long moves are a matter of holding and letting go at the right moment rather than tapping.
Short runs are normal. Each attempt only takes a few seconds, and a new one starts with any key, so it is a game of many tries. Learning the patterns is how the wave count goes up.
Credits and licence
Super Octogon was created by John Earnest, who also wrote Octo, the CHIP-8 development tool and emulator used to run it here (MIT licence). He placed the game in the public domain under CC0 1.0 through the Chip8 Community Archive. The licence text is linked from this page.