Call of Duty: Black Ops II

Hell's Retriever is a tomahawk.

It is obtained by feeding six zombies to the dog heads which are located around the map, there are symbols of the dogs on the walls where the dog heads appear. Once you feed a dog enough zombies they will disappear and will leave the dog symbol glowing red which means it is completed. To feed the dogs you must kill a zombie in the area of the dog and must wait for it to pull the zombies body over to it and eat it.

Note: You can only feed one zombie at a time so if you kill a horde in front of the dog it will only take one zombie and leave the rest ever after it has finshed eating its current zombie.

There are three of them around the map

:One below the Electric Cherry perk machine

:One by the Deadshot Perk machine in the infirmary

:One outside by the docks near the workbench.

Once all three symbols are glowing go into the citadel tunnels near the wardens office and just past the junction you will see 3 dog symbols above a parted wall which will contain the tomahawk, this can also be taken by multiple people so you can all get it along with the achievement

Follow this video to know how to unlock this achievement. I hope it helps!

Important:
*Difficulty: easy/original;
*number of players: solo/multiplayer;
*try to do this in the first rounds.

To obtain Hell's Retriever you must feed all three of the dog heads that appear from the walls with dead zombies.

There is one outside in the docks by the workbench.
One on the second floor of the cell block underneath Electric Cherry.
And the last one is in the infirmary just before the stairs.

Once you have fed the dogs enough zombies they will disappear and you can move onto the next one.

Once you fed all three dogs you need to go the the to top of Citadel Tunnels just past where Double Tap is and there will be a hole in the wall with the Hell's Retriever in the middle of the room.

You need to get all 3 dogs their fill of zombie corpses. At the Docks, in the middle of the cell block, and at the roof entrance. Then the Tomahawk will spawn just past the laundry room.

Everyone in the party gets the achievement when they pick up the Hell's Retriever.

Oneinsane Ninja here showing you my guide and how to easily obtain Feed The Beast Achievement and to get the all mighty Tomahawk from the Hell Hounds! Hope this helped give you the info you needed to obtain your 10G.

Here is my guide from my channel, Toslow Gaming. You need to feed three demon beasts that are on a plaque on walls. The first one is in Broadway which is upstairs from the library. The second below the roof inside the Infirmary. The final one is by the docks tucked in near the stairs. One you fill each beast with ten zombies, head to the Citadel Tunnels. In their lies a broken wall with the Hell's Retriever! Make sure you put HD.

Feed the Beast: obtain the Hell’s Retriever (tomahawk).

What you need to do is feed six zombies to three dog heads. When you kill the first zombie, the dog will come out, he will suck a dead one and eat it. He will eat five more zombies and then, he will disappear leaving a red glowing symbol on the wall. Remember you must kill the zombies very close to where the dogs are. They are located in the following areas:

- Second floor of Broadway Street, below the Electric Cherry perk machine. You can get there opening the Library when you spawn, then C-D Street, climbing up the stairs, turning right and finally opening the door.

- Docks, right next to the door that connects Docks to Citadel Tunnels.

- Infirmary, above the Cafeteria.

After you have done the process on the three areas, go to Citadel Tunnels where you will find a hole on the wall, and right above, a sign with the three dogs you fed previously. Get in, press X to take the tomahawk and the achievement will pop up.

This is my own video guide that I recently made for this achievement.

Tips:
There are three dog symbols around the map.
You have to feed each symbol 6 zombies.
One at a time!
After completing the symbols, Hell's Retriever can be found in the Citadel Tunnels.

Please watch the video as I show you exactly how to get the achievement. If you have any questions, please ask :D Thanks!