Basically Operation Wolf but with aliens. Not too shabby of an effort for a late 7800 game but it does feel a bit clunky at times. The stages do run a bit long but the game itself is ridiculously short, I was able to beat it in like 15 minutes or so. This is also one of the few 7800 games that can use the XEGS light gun, but honestly I think you're better off playing this with a controller because the XEGS gun is an inaccurate POS