<s>
is	O
a	O
fixed	O
shooter	O
arcade	O
video	O
game	O
developed	O
by	O
Crux	O
and	O
published	O
by	O
Sega	O
on	O
June	O
1985	B-Application
.	O
</s>
<s>
Repulse	B-Application
is	O
a	O
fixed	O
shooter	O
game	O
reminiscent	O
of	O
Space	B-Application
Invaders	I-Application
and	O
Phoenix	B-Application
,	O
in	O
which	O
the	O
player	O
controls	O
a	O
laser	O
cannon	O
by	O
moving	O
it	O
across	O
the	O
bottom	O
of	O
the	O
screen	O
and	O
firing	O
at	O
robotic	O
enemies	O
and	O
descending	O
alien	O
spaceships	O
through	O
six	O
stages	O
,	O
five	O
of	O
which	O
host	O
a	O
boss	O
at	O
the	O
end	O
that	O
must	O
be	O
defeated	O
in	O
order	O
to	O
progress	O
further	O
.	O
</s>
<s>
Power-ups	O
are	O
dropped	O
by	O
ally	O
helicopters	B-Application
and	O
ships	O
that	O
bring	O
to	O
the	O
players	O
a	O
faster	O
shot	O
than	O
the	O
normal	O
one	O
and	O
refills	O
the	O
laser	O
cannon	O
's	O
force	O
field	O
meter	O
.	O
</s>
<s>
Once	O
all	O
lives	O
are	O
lost	O
,	O
The	O
game	B-Application
is	I-Application
over	I-Application
,	O
unless	O
the	O
player	O
inserts	O
more	O
credits	O
into	O
the	O
arcade	O
machine	O
to	O
continue	O
playing	O
.	O
</s>
<s>
Repulse	B-Application
was	O
created	O
by	O
most	O
of	O
the	O
same	O
team	O
that	O
previously	O
worked	O
on	O
several	O
projects	O
at	O
Orca	O
and	O
Crux	O
before	O
both	O
companies	O
declared	O
bankruptcy	O
,	O
after	O
which	O
a	O
group	O
of	O
employees	O
from	O
the	O
two	O
gaming	O
divisions	O
would	O
go	O
on	O
to	O
form	O
Toaplan	O
.	O
</s>
<s>
Uemura	O
recounted	O
the	O
title	O
's	O
development	O
process	O
and	O
history	O
through	O
various	O
Japanese	O
publications	O
,	O
stating	O
that	O
development	O
lasted	O
six	O
months	O
and	O
worked	O
on	O
the	O
project	O
in	O
conjunction	O
with	O
Performan	B-Application
for	O
Toaplan	O
,	O
who	O
recruited	O
him	O
for	O
sound	O
design	O
,	O
while	O
he	O
still	O
formed	O
part	O
of	O
Crux	O
.	O
</s>
<s>
Repulse	B-Application
was	O
released	O
in	O
arcades	O
by	O
Sega	O
in	O
June	O
1985	B-Application
.	O
</s>
<s>
Though	O
Repulse	B-Application
saw	O
success	O
in	O
its	O
first	O
few	O
months	O
on	O
the	O
market	O
,	O
the	O
game	O
did	O
not	O
garner	O
attention	O
from	O
arcade	O
players	O
.	O
</s>
<s>
A	O
bootleg	O
version	O
of	O
the	O
game	O
titled	O
Son	B-Application
of	I-Application
Phoenix	I-Application
was	O
also	O
released	O
.	O
</s>
