About Bio Menace
Bio Menace is a 2D platform game with multidirectional scrolling that Apogee Software developed and published for MS-DOS on August 3, 1993. Under the hood it runs on a licensed version of id Software’s Commander Keen engine. Apart from that engine and the music, which Robert Prince composed, all of the game’s content was created by its designer, Jim Norwood. It is a single-player game.
On December 23, 2005, Apogee released Bio Menace as freeware, describing it as a “Christmas present”, and the full game can still be downloaded from Apogee’s website. That means anyone can play the original without paying. It hasn’t stopped being sold, though: the game returned in the 3D Realms Anthology and on Steam in 2014, and on GOG.com in 2015 with support for Windows, macOS and Linux. A remastered version then arrived on Steam and GOG.com in December 2025. 3D Realms holds the rights today.
How it runs in your browser
Play opens a new tab on dos.zone, where the Bio Menace page runs the 1993 MS-DOS game in js-dos. js-dos is DOS.Zone’s open-source port of DOSBox to the browser, and it recreates a DOS-era PC inside the tab. The files come from DOS.Zone, so you don’t download the freeware release yourself, install an emulator or sign up. You won’t see ads on DOS.Zone.
The listing is tagged action and platformer and rated 5 from 7 player reviews. Its description says only that the game is free, needs no registration and has virtual controls for mobile. Saving isn’t mentioned, and the listing doesn’t say how much of the game it includes, so check both on DOS.Zone’s page before you plan a long session.
Controls and devices
Bio Menace is played on the keyboard. DOS.Zone doesn’t list the controls, so look through the game’s menus when it starts, and click inside the emulator window first so it takes your input.
On a phone, DOS.Zone can display virtual on-screen controls. We haven’t tried the game that way, and one designed for a keyboard is easier to handle on a desktop or laptop. Chromebooks haven’t been checked.
Who it’s for
It suits players who enjoy Apogee’s early-1990s platformers and anyone curious to see what another designer built on the Commander Keen engine. Because the original is freeware, there’s nothing to buy to play it here; the 2025 remaster is a separate purchase if you want a modern version. To see the engine in its first home, try Commander Keen: Marooned on Mars, the shareware episode from 1990. Crystal Caves is another Apogee platformer on DOS.Zone, from 1991.
Is Bio Menace Free, Safe and Official?
Is Bio Menace free?
Yes. Apogee released it as freeware on December 23, 2005, calling it a Christmas present, and the full game can still be downloaded from Apogee’s website. DOS.Zone runs the MS-DOS version in a browser tab with nothing to pay and no account.
Is this the 2025 Bio Menace remaster?
No. DOS.Zone runs the original 1993 MS-DOS game in an emulated PC. The remastered version came out on Steam and GOG.com in December 2025 and is sold separately.
Can I play Bio Menace on my phone?
DOS.Zone says you can, with its virtual mobile controls. The game was built for a keyboard, though, and we haven’t tested it on a phone, so a computer is the better choice.
