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Commander Keen 4: Secret of the Oracle
DOS · 1991 · Platformer · by id Software / Apogee Software
Click the screen to capture the mouse; Esc releases it. Sound on for the full effect. First load can take a few seconds — the emulator runs entirely in your browser.
About this game
Goodbye, Galaxy! — Billy Blaze rockets to the planet Gnosticus IV to rescue the Oracles and learn the secret of the Shikadi. The Keen 4 shareware episode: id Software's smoothest scrolling yet, and a complete adventure in its own right.
SOURCE — obtained from DOS Games Archive
LICENSE — Shareware episode (Keen 4, version 1.3, EGA) — the free episode of Goodbye, Galaxy!, produced by id Software/Apogee for free distribution; DOS Games Archive lists this package as Shareware (installed).