<s>
Trog	B-Application
is	O
a	O
1990	B-Application
maze	B-Application
arcade	B-Application
video	I-Application
game	I-Application
developed	O
and	O
published	O
by	O
Midway	O
Manufacturing	O
in	O
North	O
America	O
under	O
the	O
"	O
Bally/Midway	O
"	O
label	O
and	O
later	O
by	O
Williams	O
Electronics	O
in	O
Europe	O
.	O
</s>
<s>
In	O
the	O
game	O
,	O
players	O
control	O
one	O
of	O
four	O
dinosaurs	O
chased	O
by	O
the	O
titular	O
cavemen	B-Algorithm
.	O
</s>
<s>
Its	O
gameplay	O
includes	O
elements	O
of	O
Pac-Mancollect	O
all	O
items	O
in	O
a	O
maze	B-Application
,	O
eat	O
a	O
special	O
item	O
to	O
turn	O
the	O
tables	O
on	O
pursuersbut	O
supports	O
up	O
to	O
four	O
players	O
at	O
once	O
.	O
</s>
<s>
Initially	O
envisioned	O
as	O
a	O
hybrid	O
puzzle/strategy	O
project	O
,	O
its	O
original	O
concept	O
was	O
later	O
reworked	O
into	O
a	O
Pac-Man-like	O
title	O
after	O
poor	O
reception	O
from	O
testers	O
and	O
features	O
claymation	O
graphics	O
,	O
advertised	O
as	O
"	O
Playmation	O
"	O
by	O
Midway	O
.	O
</s>
<s>
Conversions	O
for	O
the	O
Nintendo	O
Entertainment	O
System	O
and	O
DOS	B-Device
were	O
released	O
by	O
Acclaim	O
Entertainment	O
in	O
1990	B-Application
and	O
1991	B-Application
respectively	O
,	O
reducing	O
the	O
number	O
of	O
simultaneous	O
players	O
to	O
two	O
.	O
</s>
<s>
Both	O
the	O
arcade	B-Application
and	O
NES	O
versions	O
garnered	O
positive	O
reception	O
from	O
critics	O
.	O
</s>
<s>
Trog	B-Application
is	O
a	O
maze	B-Application
game	I-Application
reminiscent	O
of	O
Pac-Man	B-Application
where	O
players	O
assume	O
the	O
role	O
of	O
Theropod-like	O
dinosaurs	O
(	O
with	O
Styracosaurus-like	O
heads	O
)	O
Rex	O
,	O
Bloop	O
,	O
Spike	O
and/or	O
Gwen	O
,	O
through	O
49	O
islands	O
set	O
in	O
the	O
land	O
of	O
"	O
Og	O
"	O
,	O
home	O
to	O
the	O
one-eyed	O
cavemen	B-Algorithm
known	O
as	O
the	O
"	O
Trog	B-Application
"	O
.	O
</s>
<s>
Players	O
must	O
pick	O
up	O
all	O
colored	O
eggs	O
lying	O
around	O
the	O
map	O
as	O
the	O
titular	O
cavemen	B-Algorithm
wander	O
around	O
,	O
attempting	O
to	O
eat	O
them	O
.	O
</s>
<s>
Unlike	O
Pac-Man	B-Application
,	O
the	O
dinosaurs	O
can	O
attack	O
at	O
any	O
time	O
with	O
a	O
punch	O
that	O
does	O
not	O
require	O
a	O
power-up	O
.	O
</s>
<s>
The	O
power-ups	O
randomly	O
spawn	O
to	O
help	O
finish	O
the	O
level	O
;	O
these	O
include	O
red	O
flowers	O
that	O
increase	O
the	O
player	O
's	O
speed	O
;	O
ice	O
cubes	O
that	O
freeze	O
all	O
on-screen	O
Trogs	B-Application
;	O
pineapples	O
,	O
which	O
turn	O
the	O
character	O
into	O
a	O
full-grown	O
T-Rex	O
and	O
temporarily	O
eat	O
Trogs	B-Application
(	O
similar	O
to	O
Pac-Man	B-Application
'	O
s	O
Power	O
pellets	O
,	O
except	O
the	O
power-up	O
occurs	O
randomly	O
)	O
;	O
and	O
a	O
firebrand	O
which	O
bestows	O
a	O
temporary	O
fire	O
breathing	O
ability	O
on	O
the	O
dinos	O
.	O
</s>
<s>
The	O
Trogs	B-Application
themselves	O
are	O
subject	O
to	O
all	O
hazards	O
the	O
player	O
is	O
;	O
they	O
can	O
even	O
be	O
taken	O
out	O
by	O
their	O
own	O
wheels	O
,	O
fire	O
and	O
pits	O
to	O
comic	O
effect	O
.	O
</s>
<s>
Trogs	B-Application
can	O
be	O
one-hit	O
punched	O
,	O
to	O
the	O
side	O
of	O
the	O
head	O
,	O
as	O
they	O
approach	O
the	O
screen	O
edge	O
resulting	O
in	O
them	O
falling	O
into	O
the	O
sea	O
,	O
with	O
bonus	O
points	O
rewarded	O
to	O
the	O
player	O
.	O
</s>
<s>
There	O
are	O
three	O
levels	O
of	O
difficulty	O
:	O
Easy	O
,	O
Advanced	O
and	O
Expert	O
(	O
Although	O
the	O
Arcade	B-Application
operator	O
can	O
set	O
the	O
difficulty	O
in	O
the	O
operator	O
menu	O
to	O
make	O
the	O
game	O
more	O
difficult	O
on	O
easier	O
levels	O
,	O
without	O
the	O
player	O
's	O
knowledge	O
of	O
the	O
true	O
global	O
difficulty	O
.	O
)	O
.	O
</s>
<s>
As	O
the	O
levels	O
progress	O
,	O
the	O
cavemen	B-Algorithm
become	O
smarter	O
and	O
invent	O
new	O
ways	O
to	O
capture	O
the	O
dinosaurs	O
.	O
</s>
<s>
Catapults	O
and	O
transportation	O
chambers	O
in	O
latter	O
stages	O
help	O
evade	O
these	O
attacks	O
,	O
however	O
these	O
are	O
also	O
usable	O
by	O
the	O
Trogs	B-Application
resulting	O
in	O
some	O
tactical	O
gameplay	O
options	O
.	O
</s>
<s>
Trog	B-Application
was	O
co-designed	O
by	O
George	O
N	O
.	O
Petro	O
and	O
Jack	O
E	O
.	O
Haeger	O
,	O
who	O
worked	O
on	O
previous	O
Midway	O
releases	O
such	O
as	O
NARC	B-Application
.	O
</s>
<s>
Due	O
to	O
poor	O
reception	O
,	O
Midway	O
considered	O
canceling	O
the	O
project	O
altogether	O
but	O
was	O
given	O
a	O
second	O
chance	O
for	O
two	O
reasons	O
:	O
The	O
first	O
one	O
was	O
because	O
Haeger	O
had	O
already	O
spent	O
so	O
much	O
of	O
the	O
budget	O
on	O
the	O
clay	O
animation	O
and	O
the	O
second	O
reason	O
was	O
because	O
one	O
of	O
the	O
testers	O
suggested	O
turning	O
it	O
into	O
a	O
Pac-Man-like	O
game	O
.	O
</s>
<s>
Trog	B-Application
was	O
first	O
released	O
in	O
arcades	O
by	O
Midway	O
in	O
North	O
America	O
in	O
March	O
1990	B-Application
and	O
later	O
in	O
Europe	O
by	O
Williams	O
in	O
February	O
1991	B-Application
.	O
</s>
<s>
In	O
1990	B-Application
,	O
a	O
faithful	O
conversion	O
of	O
the	O
game	O
by	O
Software	O
Creations	O
was	O
released	O
for	O
DOS	B-Device
computers	O
by	O
Acclaim	O
Entertainment	O
.	O
</s>
<s>
However	O
,	O
the	O
DOS	B-Device
version	O
only	O
supports	O
two	O
players	O
instead	O
of	O
four	O
,	O
featuring	O
Bloop	O
and	O
Rex	O
as	O
playable	O
characters	O
.	O
</s>
<s>
In	O
October	O
1991	B-Application
,	O
the	O
title	O
was	O
then	O
ported	O
to	O
the	O
Nintendo	O
Entertainment	O
System	O
by	O
Visual	O
Concepts	O
and	O
first	O
published	O
by	O
Acclaim	O
in	O
North	O
America	O
and	O
later	O
in	O
Europe	O
.	O
</s>
<s>
Mark	O
Caswell	O
of	O
Zzap	O
!	O
64	O
gave	O
the	O
original	O
arcade	B-Application
version	O
of	O
Trog	B-Application
an	O
overall	O
positive	O
outlook	O
.	O
</s>
<s>
Trogs	B-Application
arcade	B-Application
cabinet	O
makes	O
a	O
brief	O
appearance	O
in	O
the	O
1991	B-Application
film	O
Terminator	B-Application
2	I-Application
:	I-Application
Judgment	I-Application
Day	I-Application
.	O
</s>
<s>
In	O
Revolution	B-Application
X	I-Application
,	O
one	O
of	O
the	O
Trogs	B-Application
appears	O
as	O
a	O
shootable	O
"	O
easter	O
egg	O
"	O
.	O
</s>
<s>
In	O
CarnEvil	B-Application
,	O
a	O
Trog	B-Application
can	O
be	O
found	O
in	O
the	O
"	O
Freak	O
Show	O
"	O
portion	O
of	O
the	O
game	O
as	O
an	O
attraction	O
on	O
the	O
background	O
frozen	O
in	O
a	O
block	O
of	O
ice	O
labeled	O
"	O
Frozen	O
In	O
Time	O
!	O
</s>
