Catacomb

github.comtool

2D top-down shooter developed by Softdisk (later becoming id Software). Supports EGA and CGA graphics. Written in Turbo Pascal and assembly.

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DOS

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2026-10-10

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DOS › Source code > Open source DOS games > Commercial games with published source code: “2D top-down shooter developed by Softdisk (later becoming id Software). Supports EGA and CGA graphics. Written in Turbo Pascal and assembly.”