i used to love playing this game back in the 90's in our local muzz(amusements/arcade). every Saturday i would waste a pound a time to complete it(i even completed it on 60p one time) it was 10p for 3 lives back in the halcyon days of arcade games! but the feel and the length of the levels was astonishing! some of the best levels were the ones when you were mounted on the front of the APC with a gun blasting away at the aliens,or the final battle where you get to use a powerloader to lift and drop the queen into the airlock!(niece i remember on the final battle with the queen that if you just kept shooting her loads of times she just exploded into loads of pieces in the cargo bay!) luckily i have a MAME emulator now and have the aliens rom which means i can play it on my PX anytime i like now! :0) . if anyone is still lucky enough to find it in there local amusements or cafe' in the uk mail me and let me know where it is!