<s>
Blood	O
is	O
a	O
3D	O
first-person	O
shooter	O
video	O
game	O
developed	O
by	O
Monolith	O
Productions	O
and	O
published	O
by	O
GT	O
Interactive	O
and	O
it	O
was	O
developed	O
using	O
Ken	O
Silverman	O
’s	O
Build	B-Application
engine	I-Application
.	O
</s>
<s>
The	O
shareware	B-License
version	O
was	O
released	O
for	O
MS-DOS	B-Application
on	O
March	O
7	O
,	O
1997	O
,	O
while	O
the	O
full	O
version	O
was	O
later	O
released	O
on	O
May	O
21	O
in	O
North	O
America	O
,	O
and	O
June	O
20	O
in	O
Europe	O
.	O
</s>
<s>
The	O
game	O
follows	O
the	O
story	O
of	O
Caleb	B-Application
,	O
an	O
undead	O
early	O
20th	O
century	O
gunslinger	O
seeking	O
revenge	O
against	O
the	O
dark	O
god	O
Tchernobog	O
.	O
</s>
<s>
It	O
later	O
gained	O
a	O
cult	O
following	O
from	O
reviewers	O
and	O
it	O
is	O
considered	O
to	O
be	O
one	O
of	O
the	O
best	O
games	O
on	O
the	O
Build	B-Application
engine	I-Application
.	O
</s>
<s>
A	O
sequel	O
titled	O
Blood	B-Application
II	I-Application
:	I-Application
The	I-Application
Chosen	I-Application
was	O
released	O
on	O
November	O
25	O
,	O
1998	O
.	O
</s>
<s>
The	O
game	O
was	O
released	O
on	O
GOG.com	O
along	O
with	O
its	O
two	O
expansion	O
packs	O
on	O
April	O
22	O
,	O
2010	O
,	O
utilizing	O
the	O
DOSBox	B-Application
emulator	O
to	O
run	O
on	O
modern	O
systems	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
Steam	B-Application
on	O
July	O
14	O
,	O
2014	O
.	O
</s>
<s>
A	O
remaster	O
of	O
the	O
game	O
made	O
to	O
run	O
better	O
on	O
modern	O
systems	O
entitled	O
Blood	B-Application
:	I-Application
Fresh	I-Application
Supply	I-Application
was	O
released	O
on	O
May	O
9	O
,	O
2019	O
,	O
by	O
Nightdive	O
Studios	O
and	O
Atari	O
.	O
</s>
<s>
In	O
single	O
player	O
mode	O
,	O
the	O
player	O
takes	O
the	O
role	O
of	O
Caleb	B-Application
in	O
his	O
quest	O
for	O
revenge	O
against	O
his	O
former	O
master	O
by	O
navigating	O
levels	O
in	O
episodes	O
,	O
looking	O
for	O
an	O
exit	O
,	O
until	O
the	O
boss	O
level	O
.	O
</s>
<s>
Bloods	O
gameplay	O
is	O
similar	O
to	O
other	O
classic	O
FPS	O
games	O
like	O
Doom	B-Application
:	O
the	O
player	O
must	O
activate	O
switches	O
or	O
seek	O
keys	O
to	O
go	O
through	O
the	O
levels	O
;	O
some	O
larger	O
maps	O
contain	O
up	O
to	O
six	O
different	O
keys	O
.	O
</s>
<s>
When	O
it	O
was	O
released	O
,	O
Internet	O
play	O
was	O
not	O
well	O
established	O
,	O
so	O
Blood	O
used	O
modem	B-Application
,	O
LAN	B-General_Concept
,	O
or	O
serial	O
cable	O
connections	O
for	O
multiplayer	O
.	O
</s>
<s>
Modem	B-Application
and	O
serial	O
cable	O
connections	O
only	O
allow	O
two	O
player	O
games	O
,	O
while	O
an	O
IPX	B-Protocol
network	O
connection	O
can	O
support	O
up	O
to	O
eight	O
players	O
.	O
</s>
<s>
This	O
can	O
easily	O
be	O
achieved	O
on	O
a	O
variety	O
of	O
platforms	O
that	O
support	O
DOSBox	B-Application
and	O
its	O
IPX	B-Protocol
modes	O
,	O
coupled	O
with	O
VPN	B-Application
software	O
such	O
as	O
Hamachi	B-Application
.	O
</s>
<s>
The	O
various	O
levels	O
contain	O
elements	O
from	O
the	O
1920s	O
,	O
1930s	O
,	O
and	O
1940s	O
,	O
in	O
addition	O
to	O
futuristic	O
and	O
retro-futuristic	O
technologies	O
and	O
a	O
weird	B-Application
West	I-Application
theme	O
.	O
</s>
<s>
The	O
sequel	O
,	O
Blood	B-Application
II	I-Application
:	I-Application
The	I-Application
Chosen	I-Application
,	O
retroactively	O
dates	O
the	O
game	O
to	O
the	O
year	O
1928	O
.	O
</s>
<s>
The	O
player	O
takes	O
on	O
the	O
role	O
of	O
Caleb	B-Application
,	O
once	O
the	O
supreme	O
commander	O
of	O
a	O
cult	O
called	O
"	O
The	O
Cabal	O
"	O
,	O
worshipers	O
of	O
the	O
forgotten	O
god	O
Tchernobog	O
.	O
</s>
<s>
Known	O
as	O
a	O
merciless	O
gunfighter	B-Application
in	O
the	O
late	O
19th	O
century	O
American	O
West	O
,	O
Caleb	B-Application
joined	O
the	O
Cabal	O
in	O
1871	O
after	O
meeting	O
Ophelia	O
Price	O
,	O
a	O
woman	O
whose	O
husband	O
and	O
son	O
may	O
have	O
been	O
murdered	O
by	O
the	O
members	O
of	O
the	O
Cabal	O
;	O
it	O
is	O
implied	O
that	O
she	O
later	O
became	O
Caleb	B-Application
's	O
lover	O
.	O
</s>
<s>
Several	O
years	O
later	O
,	O
Caleb	B-Application
rises	O
from	O
his	O
grave	O
,	O
seeking	O
answers	O
and	O
vengeance	O
.	O
</s>
<s>
In	O
search	O
of	O
the	O
gargoyle	B-Application
Cheogh	B-Application
,	O
one	O
of	O
Tchernobog	O
's	O
minions	O
,	O
Caleb	B-Application
moves	O
to	O
the	O
rail	O
yard	O
and	O
station	O
,	O
where	O
he	O
boards	O
the	O
northbound	O
"	O
Phantom	O
Express	O
"	O
.	O
</s>
<s>
Emerging	O
from	O
the	O
wreckage	O
,	O
cutting	O
through	O
swarms	O
of	O
Cabal	O
loyalists	O
and	O
other	O
creatures	O
,	O
Caleb	B-Application
enters	O
the	O
"	O
Great	O
Temple	O
"	O
.	O
</s>
<s>
A	O
teleporter	O
in	O
the	O
temple	O
leads	O
Caleb	B-Application
to	O
Cheogh	B-Application
's	O
altar	O
,	O
where	O
he	O
fights	O
and	O
slays	O
the	O
creature	O
.	O
</s>
<s>
Caleb	B-Application
finishes	O
by	O
lighting	O
up	O
Ophelia	O
's	O
funeral	O
pyre	O
to	O
cremate	O
her	O
body	O
.	O
</s>
<s>
Caleb	B-Application
heads	O
to	O
the	O
Arctic	O
north	O
on	O
a	O
large	O
icebound	O
wooden	O
sailing	O
ship	O
.	O
</s>
<s>
Navigating	O
the	O
Cabal	O
infested	O
tunnels	O
,	O
Caleb	B-Application
finds	O
a	O
dark	O
stony	O
cavern	O
where	O
he	O
defeats	O
Shial	O
,	O
crushing	O
her	O
with	O
a	O
stomp	O
of	O
his	O
boot	O
.	O
</s>
<s>
Cerberus	B-Application
is	O
promoted	O
to	O
Tchernobog	O
's	O
second	O
in	O
command	O
.	O
</s>
<s>
Caleb	B-Application
moves	O
across	O
an	O
industrial	O
facility	O
,	O
entering	O
a	O
nearby	O
dam	O
control	O
installation	O
located	O
near	O
Cerberus	B-Application
 '	O
cavern	O
,	O
then	O
blows	O
up	O
the	O
dam	O
with	O
explosives	O
.	O
</s>
<s>
The	O
resulting	O
flood	O
makes	O
Cerberus	B-Application
 '	O
hideout	O
accessible	O
.	O
</s>
<s>
Caleb	B-Application
kills	O
Cerberus	B-Application
,	O
and	O
upon	O
finding	O
no	O
trace	O
of	O
Ishmael	O
,	O
fills	O
Cerberus	B-Application
 '	O
stomach	O
with	O
bundles	O
of	O
TNT	O
,	O
and	O
blows	O
up	O
the	O
corpse	O
.	O
</s>
<s>
Caleb	B-Application
heads	O
for	O
the	O
"	O
Hall	O
of	O
the	O
Epiphany	O
"	O
where	O
Tchernobog	O
is	O
waiting	O
.	O
</s>
<s>
There	O
,	O
before	O
facing	O
him	O
,	O
Caleb	B-Application
learns	O
why	O
"	O
The	O
Chosen	O
"	O
were	O
cast	O
down	O
:	O
Tchernobog	O
knew	O
Caleb	B-Application
would	O
return	O
to	O
him	O
,	O
killing	O
anyone	O
he	O
ran	O
into	O
to	O
take	O
his	O
revenge	O
and	O
thus	O
gaining	O
immense	O
power	O
,	O
something	O
Tchernobog	O
wants	O
for	O
himself	O
.	O
</s>
<s>
Caleb	B-Application
battles	O
and	O
destroys	O
the	O
dark	O
god	O
.	O
</s>
<s>
One	O
of	O
Tchernobog	O
's	O
worshipers	O
approaches	O
Caleb	B-Application
and	O
declares	O
him	O
their	O
new	O
god	O
.	O
</s>
<s>
Caleb	B-Application
shoots	O
him	O
and	O
leaves	O
the	O
Hall	O
of	O
Epiphany	O
.	O
</s>
<s>
The	O
first	O
episode	O
of	O
Blood	O
was	O
released	O
as	O
shareware	B-License
.	O
</s>
<s>
The	O
full	O
retail	O
version	O
of	O
Blood	O
was	O
released	O
on	O
a	O
CD-ROM	O
,	O
featuring	O
all	O
four	O
original	O
episodes	O
and	O
all	O
of	O
the	O
elements	O
that	O
were	O
missing	O
in	O
the	O
shareware	B-License
version	O
.	O
</s>
<s>
In	O
the	O
episode	O
's	O
new	O
story	O
,	O
having	O
heard	O
news	O
of	O
an	O
ancient	O
scroll	O
,	O
Caleb	B-Application
sets	O
out	O
to	O
retrieve	O
it	O
for	O
his	O
own	O
dark	O
needs	O
.	O
</s>
<s>
New	O
enemies	O
are	O
included	O
in	O
the	O
Plasma	O
Pak	O
,	O
and	O
all	O
of	O
them	O
are	O
featured	O
in	O
the	O
extra	O
episode	O
;	O
the	O
new	O
creatures	O
include	O
two	O
new	O
Cabal	O
loyalist	O
types	O
,	O
Chrysallid	O
pods	O
,	O
miniature	O
Calebs	B-Application
,	O
and	O
a	O
new	O
boss	O
,	O
the	O
Beast	O
.	O
</s>
<s>
There	O
are	O
no	O
new	O
weapons	O
added	O
to	O
Caleb	B-Application
's	O
arsenal	O
,	O
though	O
some	O
new	O
weapon	O
abilities	O
are	O
introduced	O
;	O
the	O
Tesla	O
Cannon	O
can	O
now	O
be	O
wielded	O
akimbo	O
(	O
provided	O
the	O
appropriate	O
power-up	O
is	O
collected	O
)	O
,	O
while	O
the	O
Napalm	O
Cannon	O
and	O
Life	O
Leech	O
have	O
new	O
secondary	O
attacks	O
.	O
</s>
<s>
After	O
Caleb	B-Application
learns	O
the	O
Cabal	O
is	O
training	O
replacements	O
for	O
the	O
fallen	O
Chosen	O
,	O
he	O
sets	O
out	O
to	O
stop	O
the	O
cult	O
's	O
plans	O
.	O
</s>
<s>
Caleb	B-Application
moves	O
into	O
Cabal	O
territory	O
,	O
wreaking	O
havoc	O
in	O
a	O
temple	O
complex	O
,	O
then	O
storming	O
the	O
inner	O
temple	O
.	O
</s>
<s>
Satisfied	O
the	O
temples	O
have	O
been	O
dealt	O
with	O
,	O
Caleb	B-Application
enters	O
the	O
training	O
ground	O
for	O
"	O
The	O
Chosen	O
"	O
.	O
</s>
<s>
In	O
order	O
to	O
rest	O
,	O
Caleb	B-Application
destroys	O
each	O
of	O
the	O
four	O
"	O
Chosen	O
"	O
in	O
training	O
and	O
the	O
Beasts	O
within	O
them	O
.	O
</s>
<s>
Following	O
the	O
success	O
of	O
Duke	B-Application
Nukem	I-Application
3D	I-Application
,	O
development	O
progress	O
was	O
made	O
public	O
starting	O
in	O
June	O
1996	O
with	O
weekly	O
updates	O
on	O
their	O
website	O
.	O
</s>
<s>
On	O
January	O
22	O
,	O
1997	O
,	O
all	O
rights	O
had	O
been	O
sold	O
to	O
Monolith	O
so	O
that	O
3D	O
Realms	O
could	O
focus	O
efforts	O
on	O
Shadow	B-Application
Warrior	I-Application
,	O
another	O
Build	B-Application
engine	I-Application
game	O
slated	O
for	O
release	O
the	O
same	O
year	O
.	O
</s>
<s>
Blood	O
was	O
one	O
of	O
two	O
games	O
(	O
the	O
other	O
being	O
Shadow	B-Application
Warrior	I-Application
)	O
that	O
took	O
advantage	O
of	O
the	O
Build	B-Application
engine	I-Application
's	O
support	O
for	O
voxel	B-Algorithm
objects	O
in	O
the	O
game	O
world	O
.	O
</s>
<s>
Blood	O
used	O
this	O
for	O
weapon	O
and	O
ammo	O
pickups	O
,	O
power-ups	O
,	O
and	O
occasionally	O
decorations	O
,	O
such	O
as	O
the	O
tombstones	B-Language
in	O
the	O
first	O
level	O
of	O
episode	O
one	O
,	O
"	O
Cradle	O
to	O
Grave	O
"	O
.	O
</s>
<s>
The	O
Build	B-Application
engine	I-Application
was	O
enhanced	O
for	O
Blood	O
to	O
allow	O
new	O
lighting	O
effects	O
,	O
real-time	O
shadows	O
,	O
and	O
simulated	O
"	O
rooms	O
above	O
rooms	O
"	O
.	O
</s>
<s>
3D	O
Realms	O
sold	O
Monolith	O
the	O
intellectual	O
property	O
(	O
IP	O
)	O
so	O
3D	O
Realms	O
could	O
make	O
Shadow	B-Application
Warrior	I-Application
.	O
</s>
<s>
Atari	O
re-released	O
Blood	O
and	O
Blood	B-Application
2	I-Application
on	O
Steam	B-Application
and	O
GOG	O
,	O
but	O
unlike	O
other	O
Build	B-Application
engine	I-Application
games	O
(	O
Duke	B-Application
Nukem	I-Application
3D	I-Application
and	O
Shadow	B-Application
Warrior	I-Application
)	O
,	O
the	O
source	O
code	O
for	O
Blood	O
has	O
not	O
officially	O
been	O
released	O
,	O
however	O
multiple	O
incomplete	O
versions	O
of	O
it	O
exist	O
online	O
.	O
</s>
<s>
It	O
was	O
released	O
on	O
May	O
9	O
,	O
2019	O
,	O
under	O
the	O
title	O
Blood	B-Application
:	I-Application
Fresh	I-Application
Supply	I-Application
.	O
</s>
<s>
The	O
new	O
version	O
featured	O
compatibility	O
with	O
modern	O
operating	O
systems	O
and	O
native	O
support	O
for	O
monitor	O
resolutions	O
up	O
to	O
4K	O
,	O
anti-aliasing	O
,	O
ambient	O
occlusion	O
and	O
interpolation	B-Algorithm
among	O
other	O
improvements	O
.	O
</s>
<s>
Blood	O
received	O
"	O
generally	O
favorable	O
"	O
reviews	O
from	O
professional	O
critics	O
,	O
according	O
to	O
review	B-Application
aggregator	I-Application
website	O
Metacritic	O
based	O
on	O
seven	O
reviews	O
.	O
</s>
<s>
GamingOnLinux	O
reviewer	O
Hamish	O
Paul	O
Wilson	O
decided	O
in	O
a	O
2015	O
retrospective	O
that	O
Blood	O
was	O
easily	O
the	O
best	O
of	O
the	O
three	O
major	O
Build	B-Application
engine	I-Application
games	O
,	O
stating	O
that	O
Blood	O
was	O
"	O
one	O
of	O
the	O
most	O
underrated	O
shooters	O
of	O
the	O
whole	O
decade	O
.	O
</s>
<s>
Blood	O
arguably	O
built	O
more	O
on	O
the	O
legacy	O
of	O
Duke	B-Application
Nukem	I-Application
3D	I-Application
than	O
Shadow	B-Application
Warrior	I-Application
did	O
,	O
taking	O
its	O
gameplay	O
to	O
sophisticated	O
new	O
heights	O
and	O
offering	O
its	O
referential	O
overtones	O
with	O
an	O
even	O
greater	O
degree	O
of	O
refinement	O
"	O
.	O
</s>
<s>
Player	O
Attack	O
described	O
Blood	O
in	O
a	O
2011	O
article	O
as	O
"	O
the	O
best	O
of	O
the	O
Build	B-Application
engine	I-Application
games	O
after	O
Duke	B-Application
Nukem	I-Application
3D	I-Application
,	O
with	O
its	O
combination	O
of	O
scary	O
atmosphere	O
,	O
great	O
level	O
design	O
and	O
challenging	O
gameplay	O
putting	O
it	O
above	O
the	O
rest	O
"	O
.	O
</s>
<s>
The	O
game	O
has	O
inspired	O
numerous	O
fan	B-Application
homages	I-Application
and	O
remakes	O
,	O
including	O
Transfusion	O
,	O
ZBlood	O
,	O
BloodCM	O
,	O
and	O
The	O
Flesh	O
Game	O
,	O
as	O
well	O
as	O
community	O
produced	O
source	O
ports	O
such	O
as	O
BloodGDX	O
,	O
NBlood	O
and	O
Raze	O
.	O
</s>
