A Playground game from 1980’s Britain, Human Space Invaders is that rare thing - a successful computer into real-life game conversion.
Line up a group of boys against a wall, three or four rows deep. These players must shuffle from side to side (hopefully en masse) progressing forward one step only when they have shuffled a required sideways distance. The game player stands facing them from a distance of 15m or so with a collection of footballs. These he fires one at a time at the advancing hordes of invaders. Any player hit is killed and the game continues until all aliens are killed or until one or more reaches the firer.
Invading players can make the game more realistic by moving their arms from down by their sides to up above heads as they shuffle around.
strange games no:117