Gravity Force is a computer game released in 1989 for the Amiga by Kingsoft GmbH. It is a 2D Thrust-clone, with single player missions and a 2-player multiplayer mode. It is primarily notable for inspiring the far more popular unofficial sequel Gravity Force 2.
Source: Wikipedia, "[en.wikipedia.org/wiki/Gravity_Force Gravity Force]", available under the CC-BY-SA License.
All work (coding, graphics and music) by Stephan Wenzler