Fall Up

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Fall Up
Title Fall Up.png
Mod-ingame-Fall Up.png
Modded episodeKeen 1
Release date
Discussion(s)PCKF Keen: Modding
Secret levels1
New graphics?Yes
New sounds?Yes
New music?N/A
(6 votes)

Commander Keen: Fall Up is KeenRush's fourth mod, made for Keen 1. The mod is all about gameplay and motion. Playing it differs largely from the ordinary Keen 1-3 because of the changes in the game's physics: the mod is based on a system where gravity changers change the gravity, once collected. Keen has infinite lives, but not his trademark raygun or pogo stick. If player 'shoots', Keen's head will explode and he will get out of the level as in case of an usual hazard related death.

The gravity changers

There are five gravity changers (pictured on left and listed below in order from left to right). Once Keen enters a level the gravity is always set normal (the gravity used in the original games).

  • Gravity Glider -- makes Keen able to float in air
  • High Jumps -- makes Keen able to jump higher
  • Just Normal -- returns the gravity to normal
  • Gravity Grip -- makes Keen fall slowly, and unable to jump upwards
  • Negative Gravity -- makes Keen fall up


Groggy and confused, Commander Keen finds himself, yet again, in an unexpected zone. Where the garg am I? Why the garg am I here? Maybe he will learn...

Level Maps

Spoiler Warning! This shows the whole levels.