Catalogue of Arcade Emulation Software - the Absolute Reference

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IPM Invader

IPM Invader (c) 1979 Irem.


Main CPU : M6502 (@ 2.5 Mhz)

Screen orientation : Vertical

Video resolution : 224 x 240 pixels

Screen refresh : 60.00 Hz

Palette Colors : 8

Players : 2

Control : 2-way joystick

Buttons : 1


Known as the poor mans version of "Space Invaders". IPM Invader was manufactured by a company called IPM, which later changed it's name to IREM.


It is like "Space Invaders", with identical graphics. It uses a color monitor instead of a black and white monitor with a color overlay.

It has the addition of the famous 'coffee break'. What's the 'coffee break'? The 'coffee break' is a unique feature in IPM Invaders whereas after every 3rd wave or pattern of invaders, the 'coffee break' appears.

Another unique feature in IPM Invader is the 'capsules'. When dip switch settings are changed to advanced settings, the game becomes more difficult with the introduction of the UFO (mystery score ship) dropping 'capsules' that hatch into new invaders. The 'capsules' cannot be destroyed until they hatch, and are dropped across the screen to defeat the players 'narrow column' strategy.


Large Invader : 10 points

Medium Invader : 20 points

Small Invader : 30 points

UFO : 50 to 300 points