Call of Duty: Black Ops II

Head to the Mystery box just outside the BANK and try to get the TIME BOMB. Once you have this select it with down on the D pad then throw it down with LT and the press RT and the achievement is yours. What this does is it rewinds the time back to the round you first put it down. Keep in mind when doing this as you will lose everything collected after you put it down like weapons, points etc.

Make your way all the way to the mystery box and spin the box till you get the time bomb, then simply use the bomb and the achievement is yours.

Start a Buried game by going to Zombies > Resolution 1295 > Processing > Buried
NOTE: This achievement DOES work on easy so if you're new to zombies try that!

Go down into the tunnels.
Find the blue glowing mystery box opposite the general store. Keep hitting the box until you get the Time Bomb [950pts per try].
NB: In the higher rounds, if you lose the box you can find it by buying the vulture perk from the church [3000pts], however if you are solely going for this achievement I recommend simply restarting the game if you don't get it before the box moves.

The time bomb is used like C4. Press down on the dpad. Throw the bomb with left trigger then when you wish, press right trigger to travel back to the time and place when/where you threw the time bomb.
Pop goes the cheevo.

Happy hunting
coreymawf

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All credit for this youtube video goes to Howess.

Call Of Duty Zombies Buried Revisionist Historian Achievement

Call Of Duty Zombies Buried Revisionist Historian Achievement
Revisionist Historian: In Buried, rewrite history

To complete this achievement you need to start by getting the time machine out of the box.

Once you have the device you just place it on the floor or the wall on a level you would like to return to. You will get a stopwatch and a little icon on your screen showing the level you would like to return to.

Once you get over run or your ready to get the achievement or trophy hit the button, your screen will go through a time travel swirl effect and that's it.

It is possible that this item may be linked to the Easter Egg but i have not got that far yet.

the achievement itself is very easy, however to get the "time bomb" itself can be tedious, and so I've put together a guide to help rookies get the time bomb

Ok so this is a fairly easy cheevo.
Firstly I will go up throufgh how to set up and explain some stuff.

Head down to the main place (bourogh or whatever its called) and get points ever using the bank or killing zombies.Whern you have enough points using the box its first spawn location is opposite the general store and below the courtroom(place with speed cola).You can use leroy (the big guy) the keep it there using candy or you can purchase scavenger in the church and it will show you where the box is through walls.

Anyway onto the cheevo you must get the time bomb from the mystery box thats why you need the points.Once you have equip using the dpad and you should be holding a clock and a box with a clock press LT and you will place it on the floor.Then press RT and the screen should distort and stuff and youll go back to when you placed it and the cheevo should pop.

This was my first solution please dont hate and tell me how i can improve.
Thanks hope this helps.