This neat little horizontally-scrolling blast takes progressive weaponry to satisfying extremes. As usual, alien annihilation rewards you with armament icons in five exotic flavours. Rapid fire is automatic, and by collecting further icons you can upgrade each weapon up to four times, choosing between them with a press of the Fire button. This excellent system allows you to turn your little jet-packer into a real ass-kicking merchant of menace.
Unfortunately, Zybex is not without its flaws, namely some rather ropey collision detection and sound routines courtesy of Geiger Counter Simulator. The ultra-blasty gameplay makes up for such shortcomings though and, after a few games, I was nigh on addicted. Recommended.
In spite of a couple of technical flaws, Zybex manages to be a pretty nifty shoot-'em-up which arcade freaks should enjoy.