ajdnik/gozork

A Zork I game ported from ZIL source to Golang.

Description

Zork I is a 1980 interactive fiction game written by Marc Blank, Dave Lebling, Bruce Daniels and Tim Anderson and published by Infocom. To learn more about the history of the game feel free to read Zork I: The Great Underground Empire on Medium.

Install

Pre-built binary

Download the latest release for your platform from the releases page:

Platform	Archive
Linux amd64	gozork-linux-amd64.tar.gz
Linux arm64	gozork-linux-arm64.tar.gz
macOS amd64	gozork-darwin-amd64.tar.gz
macOS arm64	gozork-darwin-arm64.tar.gz
Windows amd64	gozork-windows-amd64.tar.gz
Windows arm64	gozork-windows-arm64.tar.gz

Verify the checksum against checksums-sha256.txt included in the release.

Linux / macOS:

sha256sum -c checksums-sha256.txt --ignore-missing

macOS (if sha256sum unavailable):

shasum -a 256 -c checksums-sha256.txt --ignore-missing

Windows (PowerShell):

$file = "gozork-windows-amd64.tar.gz"
$expected = (Select-String $file checksums-sha256.txt).Line.Split(" ")[0]
$actual = (Get-FileHash $file -Algorithm SHA256).Hash.ToLower()
if ($actual -eq $expected) { "OK" } else { "MISMATCH" }

Verify signature (sigstore)

Releases are signed with sigstore keyless signing. To verify:

cosign verify-blob checksums-sha256.txt \
  --bundle checksums-sha256.txt.sigstore \
  --certificate-oidc-issuer https://token.actions.githubusercontent.com \
  --certificate-identity-regexp '^https://github\.com/ajdnik/gozork/'

Verify SLSA provenance

Releases include SLSA L3 provenance attestations. To verify:

slsa-verifier verify-artifact gozork-<os>-<arch>.tar.gz \
  --provenance-path multiple.intoto.jsonl \
  --source-uri github.com/ajdnik/gozork

Extract and run:

tar -xzf gozork-<os>-<arch>.tar.gz
./gozork

go install

Requires Go 1.25+:

go install github.com/ajdnik/gozork@latest
gozork

Build from source

git clone https://github.com/ajdnik/gozork.git
cd gozork
make run

Usage

$ ./gozork
ZORK I: The Great Underground Empire
Infocom interactive fiction - a fantasy story
Copyright (c) 1981, 1982, 1983, 1984, 1985, 1986 Infocom, Inc. All rights reserved.
ZORK is a registered trademark of Infocom, Inc.
Release 119 / Serial number 880429

West of House
You are standing in an open field west of a white house, with a boarded front door.
There is a small mailbox here.

>

Contributing

See CONTRIBUTING.md.