Strike Force is a horizontally scrolling shooter released as an arcade video game by Midway in 1991.

The game shares many features with the earlier Defender and Stargate in that play takes place in a horizontally scrolling play field above a planet's surface on which humans are under attack from alien invaders.

In all three games the player gains points and other advantages from protecting and rescuing humans from these attacks.

In the system view mode, randomly, an enemy ship will drop down to a planet, which then starts flashing.

After a certain number of planets are cleared, the player may attack the enemy base, in an attempt to destroy it and the end boss within.