---
name: "critter"
section: "6"
platform: "linux"
package: "critter"
version: "1.0.2-13"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/critter"
---

# critter(6)

Space shootemup resembling Galaxian

## NAME

Critical Mass - Space shootemup resembling Galaxian

## SYNOPSIS

**criticalmass** \[*options*\]

## DESCRIPTION

This manual page documents the game **Critical Mass**. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

**criticalmass** is a space shootemup similar to Galaxian.  The basic idea is simple: you move your ship back and forth at the bottom of the screen, shooting up, while bad guys fly around and shoot down.

Additional documentation is available in /usr/share/doc/criticalmass/Readme.html .

## OPTIONS

- **+fullscreen 0, +fullscreen 1**

  Run in windowed or in fullscreen mode, respectively.

- **+soundtrack FILE**

  Use the given file as a soundtrack.

- **+skill LEVEL**

  Start with the given skill level.  LEVEL must be one of "ROOKIE", "NORMAL", "EXPERT", and "INSANE".

## SEE ALSO

/usr/share/doc/criticalmass/Readme.html\

## AUTHOR

Criticalmass was written by Frank Becker \<crittermail2005 at telus dot net\>

This manual page was written by Daniel Burrows \<dburrows at debian dot org\>, for the Debian GNU/Linux system (but may be used by others).