''Bio Menace'' is a 2D, side-scrolling, PlatformGame both developed and published by Apogee Software in 1993 for DOS. It was built on a licensed version of Creator/{{id Software}}'s ''VideoGame/CommanderKeen'' GameEngine, and was known as ''Bio Hazard'' during production. Apart from the engine and Bobby Fisher's musical score, all in-game content was created by the game's designer, Jim Norwood.

The player controls the protagonist, Snake Logan, a top CIA operative. Upon receiving reports of Metro City being invaded by mutants, Snake is ordered to fly recon over the city. However, after crash landing in Metro City, Snake is forced to complete his mission on foot.

The game has three episodes, the first of which was released as shareware, the rest being available commercially. The episodes are:

* Episode 1 - Dr. Mangle's Lab
* Episode 2 - The Hidden Lab
* Episode 3 - Master Cain

Sales of the game were discontinued in 2000 due to problems with more modern operating systems.

Apogee released the game as freeware on December 23, 2005 as a "Christmas present" and [[http://www.3drealms.com/menace/ the full game can be downloaded from the Apogee website.]] It is likely that this decision was made due to the results of an earlier poll on the 3D Realms forums, where visitors could pick a game they would like to see released as freeware from a list of discontinued Apogee games. See also list of commercial games released as freeware.

!!This VideoGame contains examples of:
* [[spoiler:BigBad: Master Cain]]
* BossOnlyLevel: Applies to most of the bosses. The Enforcer is an exception.
* BoundAndGagged: The Hostages in the 2nd and 3rd games (except for Commander Keen)
* TheCameo: ''VideoGame/CommanderKeen'' is one of the hostages that Snake rescues in the second game. To Keen's chagrin, Snake mistakenly [[RunningGag calls him "Captain" Keen]].
* [[spoiler:DiscOneFinalBoss: Dr. Mangle, who is the BigBad of the first game, but - in a surprise twist - not of the series]]
* DistressedDamsel: The female hostages.
* DistressedDude: The male hostages.
* {{Greed}}: Dr. Mangle's motive.
* LighterAndSofter: In a sense, the second and third games. The first game was set in the aftermath of a terrorist attack, and the levels included dead (and in some cases, ''' scorched and decaying''') bodies scattered throughout several levels. The second and third games were infiltration missions to prevent further terrorist attacks and, thus, Snake doesn't stumble upon any corpses.
* LudicrousGibs - The mutants die this way.
* MadScientist: Dr. Mangle.
* MoodWhiplash: The first game has Snake wander among the ruins of a town attacked by terrorists and encounter bodies of dead InnocentBystanders while shooting at rather cartoony-looking mooks and making snarky one-liners to the survivors he rescues.
* OneWingedAngel: [[spoiler:Dr. Mangle and Master Cain]]
* {{Revenge}}: [[spoiler:Master Cain's motive]]
* RobotBuddy: It's even called "Robo-Buddy"
* {{Shapeshifting}}: Snake is able to transform into a mutant in the second game in order to solve a specific puzzle (and then transform back once said puzzle is solved).
* ThoseWackyNazis: Mangle is clearly named after Third-Reich scientist, Josef Mengele.
* YourPrincessIsInAnotherCastle: [[spoiler:Yay! Dr. Mangle's dead! But why did the developers have the guy who is ''clearly'' the BigBad die in the first episod-[[OhCrap Oh...]]]]