Wolfenstein
49 Achievements
1,000
30-35h
Unholy Lifeline
Revived 250 teammates, including 10 revives in a single match in multiplayer.
30
How to unlock the Unholy Lifeline achievement in Wolfenstein - Definitive Guide
Gir Draxa
TrueAchievements
TrueAchievements
1.) Start a match on Hospital.
2.) One player chooses an Axis Medic, the other Allies Engineer.
3.) Allow the warmup to pass and the game to start.
4.) Have the Axis Medic move to the middle of the waiting room area with the trees.
5.) Have the Allied Engineer press pause and change sides to the Axis Engineer, he should appear right next to the original Axis player.
(A 30 second countdown will start)
6.) Quickly move face to face with each other.
7.) Have the medic kill the engineer, and revive him by holding down Y.
8.) As the Engineer gets up, have him toss an ammo box. This voids is temporary invulnerability during revival and the medic can kill him instantly.
9.) Rinse and repeat #7 & 8 until only 5 seconds left on countdown, then have the Axis/Allied Player switch back.
10.) The counter is gone instantly, so as soon as the Allied player spawns, then begin repeating step 5-9 again.
Once you get the rhythm, you can easily get 4-5 revivals each time the player changes to Axis. 20+ minute game can complete this easily for 1 player.
Note: If you mess up, don't worry or quit out, all resurrections that were delivered during actual gameplay still count. None during warmup though.
Note 2: Yes, this does give you the "10 revives in a single match" requirement of this achievement as well.
KoDeeZiA
TrueAchievements
TrueAchievements
Have the guy who needs the revives be a medic (duh).
Have another dude be on the same team as the medic, being a soldier with a flamethrower. Aim at the ground and fire away (he/she can at this point just wrap his controller in rubberbands, tape, whatever)
And the third guy joins the opposite team of the other two. He is just here to prevent the game from going back to warmup.
Whenever the soldier suicides the medic just revives him. Repeat.
Edit: Apparently it's also possible for the person who's dying to tape down a button on his controller and have the player on the opposing team shoot him. (If you don't tape a button down, there'll be a few seconds of invulnerability after each revival)
Rockets88
UNOBTAINABLE DUE TO SERVER CLOSURE
This one is a huge pain, full-stop. You have to be a medic in order to have the ability to revive teammates.
So basically when a teammate gets shot he will fall down & a revive icon will appear next to his name, this icon is a small green syringe. There is now a small time frame for you to get over to your teammate and revive him. To revive someone simply look down at the person then press and hold 
. You can also spot someone who needs reviving from far away, the icon that comes up can be seen through walls.
TIPS:
– If your teammate presses 
whilst down, then this will give you an even bigger time frame to get over to him before he respawns.
– If you play an objective game mode for some reason the time frame for reviving someone is bigger. This obviously gives you more of an opportunity to revive someone.
– Small maps work well. If the map is smaller you can reach teammates faster, a map like ‘Hospital’ is perfect.
– Stay near teammates constantly. If you follow behind them and let them lead through rooms there is more of a chance they will get shot. But because you will be no more than a few metres away it will be incredibly easy for you to get some revives.
This is another online trophy that can be boosted, in my opinion it is also the trophy that needs to be boosted the most. Go down to the Multiplayer Tips section and look specifically in the Boosting Revives section for tips on how to boost.
