Addition
(TI-99 - US, Educational)
Complete
$13.18
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Developed_By:
Educational Information Systems Inc.
Published_By:
Texas Instruments Incorporated
Released On:
01 Jan 1983
Alien Addition is an educational game that combines math problems with the gameplay of a shoot 'em up. The player controls a cannon left and right along the bottom of the screen and has to shoot down aliens' space ships as they appear above him. There are five ships in a row, and they slowly descend down the screen. Each ship has a math problem written on it, and to destroy it, the player must enter the correct answer for the ship above him. If any ship reaches the bottom, the player is destroyed. The game runs for a fixed time, which can be customized by the player.
The gameplay involves shooting down aliens while solving math problems in ascending order. The player can adjust the skill level and problem range to suit their needs. With its unique blend of education and action, Alien Addition is an engaging experience for players of all ages.
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Media Type:
Cartridge
Minimum Supported System:
TI-99/4a
Number of Players Supported:
1 Player
Input Devices Supported/Optional:
Keyboard
Controller Types Supported:
Digital Joystick
Prices as of 08 Jul 2026
Typical $13.18–$13.18 (last 90 days)
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