It is a cleo mod that makes 5 UFOs seem within the deserted airport. If you happen to get near them, they’ll see you and assault you.
The UFOs will use rockets and heavy weapons to assault you.
Metallic Slug 7 Allen Boss Theme Music will play once they begin attacking you.
UFO Mannequin replaces Hunter.
Credit to Unknown for the mannequin.
Credit:
T_Marx666