TI Invaders is a video game designed in 1981 exclusively for the Texas Instruments

Texas Instruments

Texas Instruments Inc. , widely known as TI, is an American company based in Dallas, Texas, United States, which develops and commercializes semiconductor and computer technology...

 TI-99/4A home computer. The game is essentially a Space Invaders

Space Invaders

is an arcade video game designed by Tomohiro Nishikado, and released in 1978. It was originally manufactured and sold by Taito in Japan, and was later licensed for production in the United States by the Midway division of Bally. Space Invaders is one of the earliest shooting games and the aim is to...

clone.
The object of the game is to clear the board of all invaders before they destroy all of the player's weapons or reach the bottom row.
With the joystick or keyboard, the player moves a laser base (called a missile in the manual) left and right, pressing the fire button to shoot lasers at an 11×5 grid of invaders.