Soldner-X 2: Final Prototype

See: 'Ready for the junkyard'. You will need to collect at least 4 keys in one of the first four stages to unlock Stage 5. This boss is arguably one of the most annoying, due to his extremely small target spot (Expect to spend at least 10 minutes beating him on the 'Bow Knowledge' challenge). He'll start by moving up and down, firing bullets while being flanked with enemies. Keep the fire concentrated on his eye. Once you've knocked him down a bit, he'll start to move around the screen, extending his arm at your ship (four times per cycle), then receding to the upper right corner and firing his blaster. Hang tight in the upper left corner during the extension part (he can't hit you there), and duck to the bottom right when he starts firing away. In the final phase he spins around the screen laying mines, and makes three complete passes around the screen before stopping again. Stay in the bottom left corner for the first two, then move to the top left for the third. Deliberately set off any mines nearby so you don't hit them later.