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Bad Blood
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Head forward until you reach a drop down, start making your way down without
falling too far down in one shot. Once you reach the bottom then start heading
out. You will see a helicopter trashed in the distance, you have to investigate
it. Move that way cautiously, about five or six of the smaller raptors rush you
as you go there. Use the SMG to take them out from a distance and keep moving.
If they close in and you find yourself performing cutscene after cutscene to
kill them, roll to a side and pull out your knife and start using the auto-kill
ability of it.

Once they are cleared out follow Slade. You will rather quickly find yourself
on the receiving end of a raptor attack, knock him off and then use your knife
to kill him off. Keep your knife out and stay close to Slade, he will use his
gun on the enemies and when they close in knife kill them. Keep on doing this
and you will kill the four or so of them that come.

Move forward, take out your SMG and kill the little raptors up ahead. Once they
are dead head onward and climb up the vines as instructed by Slade. As you keep
going forward you will see three small raptors up ahead, try to kill them as
fast as you can. If they get away they will be up ahead, I'll point out where
they hide. Proceed forward until you see a dinosaur with a strange shaped head,
this is a Parasaurolophus, these guys aren't dangerous unless you hit them with
a stray bullet. The one or two raptors that got away will be down there as well
so take them out and then hop down.

Move towards the ledge straight ahead and then take a right, ducking down and
going under the passage. Grab the grenades and then double back to the open
space with the dinosaurs. Look for a vine covered wall and climb up it. Up this
path you will soon encounter a swarm of dinos, first from the right and then
the left path. Kill them all and then keep moving along the left path to find a
fallen log, cross it.

As you move forward you will see a bunch of dinosaurs in an area underneath you
and a passage to your right. They can come from that passage or behind you,
luckily only the smaller ones come from behind. Stand on the ledge and fire at
the dinos down below you and try to kill all of the little ones before you pull
out your knife and kill that raptor with it.

Head to the right and look around, you should see a corpse over here with more
SMG ammo and another grenade, grab that and hop off the ledge. Now climb up the
vine wall and proceed forward until you see a helicopter fly by. Seems like you
need to get through that base, so it's time to do a little barn storming. Head
to the right, following Slade and stop when you see a raptor kill a soldier. 

If you charge down there you will find raptors and enemy soldiers duking it out 
meaning you will fight in a fairly chaotic battle. But if you hang back the 
raptors will usually kill off the soldiers, leaving you to go in and play clean 
up. Just get on the ledge near the drop off and crouch, so long as you don't
fire at anyone you will be ignored.

If you are going with the second option, of waiting, then stand around and wait
for Slade to hop down off the ledge and move forward. This means that one side
killed the other. I prefer to use my knife to slice these raptors to death in
one fell move but take them out as you prefer. If you see one down Slade, move
over to it and wait for him to kick it off and then grab it for a kill. Keep on
moving around a lot though, don't stand around or you will get knocked for a
pretty mean loop.

Kill them all and then search for ammo until you're maxed on it (300 rounds).
Now head for the burning wreckage and go on through it to find a bow in your
path. This is, arguably, the best weapon in the entire game.

* NOTE: The bow is probably the best weapon in the game. Since enemies don't
react to sound it means that you can fire the bow from either close up or far
away. If you're close but cannot get near enough to the enemy to knife them due
to another enemy hit them with the bow. It's a very good weapon and can pin an
enemy to a wall with its powerful shot. You do need to fully charge the shot by
holding the trigger down long enough. Once its fully charged you can only hold
it like that for a short time before he automatically lets it loose, you can
tell this is going to happen if the controller starts vibrating. If you aren't
ready to let the arrow go then slowly depress the RT / R2 button to release the
tension on the arrow.

Sneak ahead and you will see an enemy standing near a wall and two soldiers who
walk off to the right. Use the bow on the guy in front of you and then take out
the two to your right however you please. There are a few more enemies down the
pit in front of you, so head to the right and start creeping that way using the
bow or SMG to take them out.

Now look for a green tree looking bridge, it will go forward and curve to the
right. Go onto that and take the right path, killing the two enemies that are
over on the ground here. With them dead move forward and pull out the bow and
arrows, snipe off any enemies that you see in the distance. Now continue on the
bridges and stick to this path, killing any stragglers that come out at you.

You will reach a point where a helicopter will fly overhead, quickly move to
the left behind the rocks and lean out. Start shooting at any enemies that you
see, going behind the rocks when you need to heal and keep it up until they are 
gone. Drop down and continue forward, taking a right at the dead end. Gather up
the ammo and then double back, taking the left this time.

Keep going ahead and take a right when you reach the next fork, they both go to
the same place but the right path is better strategically. Watch the soldier
kill off the dinosaur and then catch him in the head with the SMG. Now hop down
and move forward until Slade suggests you split up. Yeah, ignore him. Stay up
here where you are and start sniping them off with the bow. Once they are all
dead, there's about seven of them, hop down and start picking up ammo before
you proceed forward. Stay alert though, there are dinos on the loose here.

Continue forward and ignore the friendly Paras here. Up ahead are two guards, I
suggest hanging back and getting the first one with a bow shot before you move
forward and kill the other with the SMG. It's very likely that all this ruckus
will draw out two angry raptors that are protecting their nest, if they do end
up running around kill them with your knife.

Now look for a ladder nearby, run over to it and climb up as quickly as you can
do so. From up here start raining arrow death upon all the enemies that you can
see to your left. Once they are dead look for more arrows on the ledge that you
are standing on and then step onto the pipe attached to this platform and start
moving along it. Use your new vantage point to wipe out the rest of the enemies
that you can see.

Once you have killed off all the visible enemies creep further along the pipe
and you will see two more emerge from a door. Kill them off as well and then
follow the pipe to its end, dropping off here to find two grenades. Now use the
door on the second floor into the MG facility and you will find a pistol with
some ammo and a lot of SMG ammo. I prefer using a pistol and SMG but choose how
you like.

Now go back down to the bottom floor and go through the door here. Slade will
run off through the forward door once you're inside so head through the left
door. Use the boxes here for cover and start picking off the enemies with your
bow and SMG. You can easily pick up the Impaler Ribbon achievement here. Search
the area for ammo and then look for a ladder, you can head up there to get some
more arrows. There is also a Blackfly (the sticky bomb gun) nearby if you so
desire it. Proceed ahead when done.

You will find yourself in a mist filled coolant room of some kind. The mist is
a good shield for your movements but the minute you attack one enemy everyone
will know where you are unless you knife them. I suggest slipping in and avoid
any enemies you can and rush up the first staircase. If you can knife the guy
that tries dropping the barrel on you then you will be able to get into cover
and fire at enemies that try coming at you from all directions. Kill everyone
on your floor and then climb up to the third floor and finish off the enemies
here. Look for a large doorway and go through the door here.

You will end up in a computer room, so head to the right to grab some ammo. Now
double back and take the left path until you reach an area where three guards
come running into the area. If you have a Blackeye use that to weaken/kill them
and then finish the last one off however you like. Keep moving and you will
be inside of a room full of catwalks with lots of guys who like to throw oodles
of grenades. Use your SMG and bow to kill some of them and then rush forward
and then head left.

Over here you should see a ladder, take the ladder up and you will find some
arrows and an SMG up here. Use this vantage point to kill off the rest of the
enemies. Once all of the enemies are dead make your way back down and head for
the large doors across from where you came in. As you near them three guards
will rush you, take them out with your SMG or Blackeye and then move on. You
will get a message from Slade telling you to meet up with him. Sure.

Go forward until you reach a room with lots of boxes. Stick to the left side
and look for a ladder. Climb up the ladder and you will find some arrows, grab
them and move forward slowly. You will see three guys down below over here, you
can kill them however you like. Move forward and another guard will come into
the room - kill him, drop down and head for the door. There are guards on your
level and above you, all needing to be killed. Get rid of them and then hop on
the elevator with Slade.

As it goes up you will be attacked from all angles, this isn't so bad on normal
but it's a killer on the higher difficulties. Try to keep your back to some of
the boxes and look around killing any enemies you see. If an enemy happens to
take you by surprise move away and reorient yourself as you wait to heal. No
biggie. If you see them dropping some flaming barrels quickly get away from the
things and stay safe.

When your ride comes to a stop hop off the elevator and take some cover away
from the fire and shoot the enemies dead. Once they're gone head up onto the
walkway and start heading towards the objective but stay frosty a group of two
or three guards will come running out at you. A grenade or sticky bomb will get
rid of them no problem. Now go through a door and you will see a red glowing
panel, this is the blast door override. Blow it up to open said doors. Now jump
down onto the lift and get ready for the only hard part of this level.

As you are trying to rid the lift to its apex the enemies will literally be
pouring into the room and this time you MUST kill some of them. If you don't do
so then they will fill up the floors faster than you can hide and you will be
killed really fast. So try to stay mobile and keep killing off all the enemies
that you can until the lift passes them enough for you to ignore them and focus
on the other enemies. Enemies above you are also more dangerous than the ones
on your level since they can hit you even while you hide behind boxes.

Once you reach the top of the building that's it, level over.