Can I play Commander Keen 4: Secret of the Oracle online for free?

Yes — you can play Commander Keen 4: Secret of the Oracle right here in your browser for free, with no installation and no plugins, on both desktop and mobile.

Can I download Commander Keen 4: Secret of the Oracle?

Yes, Commander Keen 4: Secret of the Oracle is available to download here — use the Download button on this page.

What platform does Commander Keen 4: Secret of the Oracle run on?

Commander Keen 4: Secret of the Oracle is a MS-DOS / PC game from 1991.

When was Commander Keen 4: Secret of the Oracle released?

Commander Keen 4: Secret of the Oracle was released in 1991.

Who made Commander Keen 4: Secret of the Oracle?

Commander Keen 4: Secret of the Oracle was developed by id Software.

What genre is Commander Keen 4: Secret of the Oracle?

Commander Keen 4: Secret of the Oracle falls under: Platform.

Are there cheats for Commander Keen 4: Secret of the Oracle?

Yes, you'll find cheats and codes for Commander Keen 4: Secret of the Oracle in the Cheats section on this page.

How do I save my progress in Commander Keen 4: Secret of the Oracle?

Save inside the game itself — via its own menu, or F2/F3. And if you log in (free), your position is also stored in the cloud, so you can continue on another computer or phone.

Is it legal to play Commander Keen 4: Secret of the Oracle online here?

You play it in your browser via an emulator. For how we handle abandonware and copyright, see our "Is it legal?" page.

How do I control Commander Keen 4: Secret of the Oracle?

The controls are in the Controls section on this page. The keyboard is usually all you need — arrow keys to move and Ctrl, Alt or Space for actions.

Can I play Commander Keen 4: Secret of the Oracle on mobile?

Yes — it runs right in your browser on phones and tablets too. Just tap Play, nothing to install.

Commander Keen 4: Secret of the Oracle

– MS-DOS

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ControlsArrows moveCtrl jumpEsc useEnter/Space start/selectEsc menuMS-DOS

1991 · Platform · id Software · MS-DOS / PC

Game info_□✕

About Commander Keen 4: Secret of the Oracle

Commander Keen 4: Secret of the Oracle, released in 1991, is the standout of the second Keen trilogy and one of the games that put id Software on the map before Wolfenstein and Doom. It stars Billy Blaze, an eight-year-old genius who dons a football helmet to become Commander Keen, defender of the galaxy. This entry sends him to the Shadowlands to rescue the Oracle's kidnapped council members from the villainous Shikadi, unfolding across a colorful world map that branches into distinct themed levels.

Commander Keen 4: Secret of the Oracle – screenshot 1

Technically it was a marvel for a PC platformer of its day, using the smooth EGA-graphics scrolling engine that id had pioneered to rival the buttery movement of console platformers, something IBM PCs were famously bad at before Keen. The design is generous and inventive: Keen's pogo stick doubles as a movement tool and a way to reach hidden areas, his stun gun handles the wandering aliens, and levels are dotted with optional secret zones and collectibles that reward the curious. The whimsical creatures, from the yorps to the ravenous mimrocks, give it a distinct sense of humor.

Commander Keen 4: Secret of the Oracle – screenshot 2

It remains hugely playable. The controls are precise, the pogo-jumping is a joy to master, and the open-ended level order lets you tackle challenges in your own way. As shareware it spread far and wide and helped establish the model id would ride to fame, and as a platformer it stands proudly alongside the console classics it was chasing. For anyone exploring the roots of PC gaming, Keen 4 is both historically important and genuinely fun.

Videos and guides

Longplaythe whole game start to finish · YouTube Walkthroughhow to get through when you are stuck · YouTube Soundtrackmusic from the game · YouTube Speedrunfastest runs of the game · speedrun.com

Commander Keen 4: Secret of the Oracle cheats and codes

Reveal cheats (spoiler)

Keen 4 has two layers of cheats. The quick one: press B + A + T together at any point during play. The deeper one is id Software’s debug mode – hold A + 2 + Enter at once, a “Debug Mode Active” message appears, and from then on the F10 combos work (hold F10 and add a letter).

Code	Effect
B + A + T (together)	All four gems, an extra life and the map items
A + 2 + Enter (together)	Activates debug mode – required for the F10 codes below
F10 + G	God mode
F10 + J	Endless jump – Keen floats for as long as you hold jump
F10 + I	Free items: gems, 99 shots and points
F10 + N	No clipping – Keen falls through walls and floors
F10 + W	Warp – asks for a level number and takes you there
F10 + Y	Reveals hidden paths on the map
F10 + E	Ends the current level instantly
F10 + S	Toggles slow-motion mode

The key combos really need to be held simultaneously – on modern keyboards it sometimes helps to press them a split second apart and keep them held. And careful with F10 + N: no clipping in this game means Keen drops straight through the floor, so use it only in short bursts.

Commander Keen 4: Secret of the Oracle FAQ

Can I play Commander Keen 4: Secret of the Oracle online for free?: Yes — you can play Commander Keen 4: Secret of the Oracle right here in your browser for free, with no installation and no plugins, on both desktop and mobile.
Can I download Commander Keen 4: Secret of the Oracle?: Yes, Commander Keen 4: Secret of the Oracle is available to download here — use the Download button on this page.
What platform does Commander Keen 4: Secret of the Oracle run on?: Commander Keen 4: Secret of the Oracle is a MS-DOS / PC game from 1991.
When was Commander Keen 4: Secret of the Oracle released?: Commander Keen 4: Secret of the Oracle was released in 1991.
Who made Commander Keen 4: Secret of the Oracle?: Commander Keen 4: Secret of the Oracle was developed by id Software.
What genre is Commander Keen 4: Secret of the Oracle?: Commander Keen 4: Secret of the Oracle falls under: Platform.
Are there cheats for Commander Keen 4: Secret of the Oracle?: Yes, you'll find cheats and codes for Commander Keen 4: Secret of the Oracle in the Cheats section on this page.
How do I save my progress in Commander Keen 4: Secret of the Oracle?: Save inside the game itself — via its own menu, or F2/F3. And if you log in (free), your position is also stored in the cloud, so you can continue on another computer or phone.
Is it legal to play Commander Keen 4: Secret of the Oracle online here?: You play it in your browser via an emulator. For how we handle abandonware and copyright, see our "Is it legal?" page.
How do I control Commander Keen 4: Secret of the Oracle?: The controls are in the Controls section on this page. The keyboard is usually all you need — arrow keys to move and Ctrl, Alt or Space for actions.
Can I play Commander Keen 4: Secret of the Oracle on mobile?: Yes — it runs right in your browser on phones and tablets too. Just tap Play, nothing to install.