Playing Doom on an Atari 2600 #Doom #Gaming #Atari

Vince at has recently updated their port of Doom to the Atari 2600 (via a 16k cartridge).

The game is complete! It’s not the full game, but it is enough to do a speedrun (you can beat original Myst very quickly only visiting a tiny part of the game if you already know all the answers).

Currently you can walk around a decent amount of Myst Island. You can flip the marker switches. You can look at the brothers’ books. You can go to D’ni and get both endings there. You can solve the fireplace puzzle. You can solve the clock puzzle. You can pick up the red/blue pages and get both endings with those. You can go up the elevator in the library to see a hint.

The game engine uses ZX02 compression for each scene. Each scenes’ graphics are limited (due to various hardware limitations) to 256 compressed bytes, which leads to having to simplify the graphics to fit. Each scene has an asymmetric playfield. Graphics are 40×48 to simplify things a bit.

Each line can be two colors, foreground and background. The background is a single color. The foreground color can change each 4-line block. sprite1 is an 8-block wide source of additional color, so one extra color per line but only in an 8-block wide column of the screen. You also get an optional one-block wide vertical line (missile0) which is the same color as the pointer. The engine allows the right-side of the screen to alternate background color every-other-line.

See the video above and more details on the site here.

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