As the title suggests, you play as a rampaging giant ape and your goal is to escape a facility while smashing through human guards.
This game provides examples of:
- Alien Blood: While all the guards have normal red blood, the ape's blood glows neon colors.
- Big Labyrinthine Building: Disc 2 has you starting at the 30th floor of a skyscraper and splattering your way to the ground floor.
- Bioweapon Beast: Presumably, the ape is this: it's strong enough to break through hardened glass walls, rip steel doors off their hinges, throw humans with enough force to reduce them to bloody splatters, and heal bullet wounds (assuming the healing in-between sections isn't just a gameplay mechanism). It's also referred to as "Subject 4" in the first level.
- Creepy Jazz Music: 99% of the soundtrack consists of a frenetic drum solo, amplifying the chaotic atmosphere of the game. However, the final song, once the ape has escaped the zoo, is Pharoah Sanders' "You've Got to Have Freedom," a free jazz piece that somehow encapsulates both joy and unrest, but is not creepy by most standards.
- Enemy Civil War: "Enemy" being humanity as a whole, that is. At the beginning of Fugue, the ape was able to escape its cage because a plane dropped a bomb on the facility. Presumably, whatever organization that captured the ape is at war with the plane's owner.
- Fire-Breathing Weapon: Some of the human opponents wield flamethrowers.
- Grievous Harm with a Body: Once you grab a guard, you can use him as a projectile.
- Humans Are Bastards: The humans are holding the gorilla and his baby captive along with other animals.
- Some of the guards have bombs strapped to them just to prevent you from getting close, implying that your human captors have no regard for human lives either.
- Killer Gorilla: You play as one.
- Ludicrous Gibs: The fate of the guards that you throw against the walls.
- Minimalism: The game's art style.
- Musical Gameplay: Some events - including each time a guard gets splattered - are punctuated by a crash cymbal.
- Papa Wolf: The bonus level has you breaking into a facility to rescue a baby gorilla and escaping.
- Pacifist Run: The "Pacifist" achievement, where you have to complete an album without killing any guards.
- Technical Pacifist: If a guard youre holding as a human shield shoots a fellow guard, it doesnt count against you for the Pacifist achievement.
- Video Game Caring Potential: In the final level of Disc 4, you've been captured and are being held in a zoo. As you escape, you can smash cages holding other dangerous wildlife like bears, snakes, and lions to let them take their own revenge on the guards.