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Gravity Force is a shareware/freeware computer game series originally for the Amiga but later extended to other platforms. Being Thrust-clones, the 2D games feature single player missions and a 2-player multiplayer mode.
The aim is to pilot a spacecraft through subterranean caverns avoiding enemy fire. The ship is subject to gravity and inertia and colliding with terrain or the walls of the cave results in destruction of the ship.
Gravity Force 2 and Gravity Power
In 1994, Jens Andersson and Jan Kronqvist released Gravity Force 2 in both freeware and registered shareware versions. Innovative split-screen and serial-cable multiplayer modes resulted in a fast-paced dogfight mode and great replayability value. Amiga Power then commissioned Gravity Power, a slightly enhanced version of Gravity Force 2 which was given away on the coverdisk of issue 50. Gravity Force 2 and Gravity Power became later both freeware.
On September 21, 2008 the developers of Gravity Force 2 released the Amiga Motorola 680x0 assembly language source code for "nostalgic interest" without specified license. In April 2017 the authors clarified the game and source code license as CC BY-SA 4.0.
Clones and continuations
Many similarly titled clones have since appeared, such as Gravity Force XNA, Gravity Jam, Gravity Power 2, Gravity Force, Gravity Strike, Gravity Fight, Gravity Wars, Gravastar, and Galaxy Forces V2. These games are generally freeware, unfinished and refer to themselves as "Gravity Force clones", rather than "Thrust-clones".
In 1995, the video game magazine Amiga Power declared Gravity Force 2 the second best Amiga game of all time (behind Sensible Soccer) which resulted in great exposure for a freeware/shareware title. In 1996, Gravity Power was subsequently declared the second best game of all time. Gravity Power was also named one of the 1001 Video Games You Must Play Before You Die.
- gf20-making-gravity-force-2 on kaijupop.com by Chris Charlton (3rd June, 2014)
- "The Gravity-Force 2 Homepage".
- Jens Andersson & Jan Kronqvist (2008-09-21). "The Gravity-Force 2 Homepage". lysator.liu.se. Retrieved 2013-10-13.
Jan made an archaeological expedition and recovered the GF2 source code from a dusty old floppy disc! We do not pretend it is a wonder in coding style (in fact, it is a complete disaster!), but for primarily nostalgic interest we publish it here.
- gf2 on lysator.liu.se "The screenshots, the GF2 source code, and the actual Amiga game (v1.10, v1.20) are released for use under the CreativeCommons CC-BY-SA license." (April 26, 2017)
- Mott, Tony (2011). Flammarion, ed. "1001 Video Games You Must Play Before You Die": 261. ISBN 978-2-0812-6217-1.
|Wikimedia Commons has media related to Gravity Force 2.|
- Gravity Force
- Gravity Force 2
- The Gravity-Force 2 Homepage
- Gravity Force 2 at MobyGames
- Gravity Force XNA
- CD32 version
- Complex Gravity, a remake of Gravity Force adding water using the Allegro library
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