Repulse © 1985 Sega.
Repulse is a 1985 arcade game by Sega. It was renamed '99: The Last War when licensed to Kyugo (who developed the hardware) and Proma. There's also a bootleg version of it named Son of Phoenix.
With a spaceship, the player shoots several kind of robotic enemies and spaceships. At the end of every stage (except for the first one), the player meets a huge enemy spaceship as the stage's boss. Player's spaceship is equipped with a limited force shield which allows it to resist any kind of attack, though energy drains both while it is active and whenever the ship gets hit during use. Power-ups come in the form of ally helicopters (except scene I, where a space shuttle drops the power-up), that bring to the player a new shot (much faster than the normal one) and refills the ship's force field meter.
Scenes in this game are:
I. Encounter,
II. Invasion,
III. Crisis,
IV. Counterattack,
V. Advance,
VI. The last war.
Main CPU : (2x) Zilog Z80 (@ 4.608 Mhz)
Sound Chips : (2x) General Instrument AY8910 (@ 1.5 Mhz)
Players : up to 2 (alternating turns)
Control : 8-way joystick
Buttons : 2
=> [A] Shoot, [B] Shield
Repulse was released by Sega in June 1985. Produced by Crux.
Default high scores (rank, score and name):
1 50000 (Ichiban)
2 50000 (Niban)
3 50000 (Sanban)
4 50000 (Yonban)
5 50000 (Goban)
Licensed products:
'99 The Last War (Proma)
'99 The Last War (Kyugo)
Known Bootlegs/Hacks:
Son of Phoenix (Associated Overseas)
Stages in this game are known as "scenes" and are numbered in Roman numerals, although IV and VI are poorly written; they look more or less like N and mirrored N respectively.
High score allows to enter up to 10 characters.
Extra life can be earned every 50000 or 70000 points, depending on the dip switch set by operator.