I initially created this game years ago with the Löve 2D Engine in a "Make a Game in a Day" challenge.
Creating all Graphics, Sounds and learning lua.
When I made the 2D extension to Torque Game Engine this was the first game I ported to test the extension.
After Torque2D became OpenSource I took this engine, ripped all 2D game stuff out of it and added my own small
extension so the Ohmtal Game Engine (OGE) was born. Again the Ohmtal Invaders was my first game to test the OGE.
Have fun ;)