<s>
Alien	B-Application
Highway	I-Application
:	I-Application
Encounter	I-Application
2	I-Application
is	O
an	O
isometric	O
action	B-Application
game	I-Application
released	O
by	O
Vortex	O
in	O
1986	O
for	O
the	O
ZX	B-Operating_System
Spectrum	I-Operating_System
and	O
Amstrad	B-Device
CPC	I-Device
.	O
</s>
<s>
It	O
was	O
programmed	O
by	O
Mark	O
Haigh-Hutchinson	O
and	O
is	O
the	O
sequel	O
to	O
Highway	B-Application
Encounter	I-Application
.	O
</s>
<s>
Gameplay	O
is	O
similar	O
to	O
Highway	B-Application
Encounter	I-Application
,	O
with	O
the	O
player	O
controlling	O
a	O
"	O
Vorton	O
"	O
robot	O
in	O
its	O
attempt	O
to	O
deliver	O
a	O
bomb	O
to	O
an	O
alien	O
base	O
at	O
the	O
end	O
of	O
a	O
highway	O
.	O
</s>
<s>
Since	O
I	O
was	O
now	O
working	O
full-time	O
for	O
Vortex	O
it	O
was	O
decided	O
that	O
I	O
should	O
write	O
Alien	B-Application
Highway	I-Application
whilst	O
Costa	O
developed	O
his	O
new	O
ideas	O
.	O
</s>
<s>
I	O
had	O
previously	O
written	O
Android	B-Application
One	I-Application
for	O
the	O
Amstrad	B-Device
CPC	I-Device
(	O
in	O
my	O
spare	O
time	O
at	O
University	O
)	O
and	O
then	O
converted	O
Highway	B-Application
Encounter	I-Application
to	O
the	O
CPC	O
in	O
8	O
weeks	O
after	O
graduation	O
.	O
</s>
<s>
Alien	B-Application
Highway	I-Application
attempted	O
to	O
retain	O
the	O
essence	O
of	O
the	O
original	O
game	O
yet	O
expand	O
the	O
gameplay	O
and	O
introduce	O
a	O
random	O
element	O
into	O
the	O
game	O
.	O
</s>
<s>
Alien	B-Application
Highway	I-Application
received	O
positive	O
reviews	O
.	O
</s>
