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Critical Mass Coverart.png
Developer(s) Simon Francis
Publisher(s) Durell Software
Platform(s) Amstrad CPC, Commodore 64, ZX Spectrum
Release 1985
Genre(s) Action

Power! (known as Critical Mass in Europe) is a computer game developed by Simon Francis in 1985 for the Amstrad CPC, Commodore 64 and ZX Spectrum.


An anti-matter power station on an orbiting asteroid is used by the local star system for energy. The station has been taken over by hostile aliens who are threatening to overload the power system which will turn the reactor into a massive black hole and destroy not only the planetary system, but several nearby stars as well.

The object of the game is to make it to the heavily defended power station and disable it before the reactor reaches critical mass and implodes.[1]


The player may control the hovercraft in either a normal joystick operational mode or with vectored movement. When the player pushes forward on the joystick, the hovercraft accelerates, and when pulling back on the joystick, speed decreases.[2]


In 1988, Dragon reviewed Power!, and gave the game 4 out of 5 stars.[2]


  1. ^ [1] Critical Mass cassette inlay instructions
  2. ^ a b Lesser, Hartley; Lesser, Patricia; Lesser, Kirk (July 1988). "The Role of Computers". Dragon (135): 82–89. 

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