River Raid MSX Game River Raid is a scrolling shooter videogame and was released in 1982 by Activision for the Atari 2600, and later the Atari 5200, Atari 8-bit, C64, ColecoVision, IBM PCjr, Intellivision, ZX Spectrum, and MSX. The player controls an airplane in a top-down view over a river and gets points for shooting down enemy planes, helicopters, ships and balloons (for versions after the Atari 2600). By flying over fuel-stations, the plane's tank can be refilled. The player can shift side to side and change the speed of the plane. Sections of the river are marked by bridges. The game was programmed by Carol Shaw, one of the Activision programmers who had previously worked at Atari and then Tandem Computers. The game is notable for providing a gigantic amount of fixed, non-random, repeating terrain despite tight limitations of available memory on its hardware platforms. The game program does not actually store the sequences of enemies and other objects; the terrain is dynamically generated algorithmically during gameplay using a linear feedback shift register with a fixed starting seed. A more highly randomised number generation system was used for enemy AI to make the game less predictable.