Age of Zombies

To receive the trophy, the best result in each level must be “0 deaths”. There is no need to go through the entire game without dying in one go.
In the first five worlds, problems can arise only with bosses. The best thing that can be advised here is to survive and throw a turret at them. The fiery one can fry any boss to almost nothing. However, the latter world requires special attention.

6-1. A constant number of enemies is maintained here (killed a dozen - a dozen more spawned immediately), plus there are no safe places. However, this can be used to your advantage. You just need to survive at the very beginning and start making circles around the map, killing as few enemies as possible. After the crowd has stabilized, you need to continue circling and slowly destroy them. No need to use grenades or special weapons. You need to be careful when killing exploding zombies - they can set the crowd on fire, which will lead to its destruction and the spawning of hundreds of new enemies. It's also worth keeping your health above 80% - you never know when an exploding zombie will spawn right in front of you.
Completing the level in this way will take 1.5 hours, but it guarantees its completion.

6-2. Here you need to hold out for 3 cycles of 4 waves. With each cycle the waves become heavier.
The first wave is harmless - you can just run around the map, restoring health and shooting only with a pistol.
The second is almost the same, but exploding zombies can ruin your life. You need to run to the upper left corner, shoot the exploding ones on the right, then 3-4 regular ones from below. Stand there until the last moment, then run down and to the right. Then you can circle around the map again, restoring your health.
The third is the beginning of hell. The safest place is on the right.
The fourth is hell. Enemies spawn everywhere, all types, etc. You need to use everything you have to survive. However, it’s worth leaving something (a shield or a minigun if you’re lucky; if you’re unlucky, then at least a couple of SMGs) for the very last and heaviest wave.

6-3 (free translation of Tyrantraxus's hint). There are 5 waves (after the 5th the 1st comes again) and an unpleasant boss.
The first one is quite harmless, you can simply circle around the map, restoring your health.
The 2nd one is similar, but it has exploding zombies. As soon as it starts, you need to throw a grenade in the upper right corner. Then run down, then left.
The 3rd wave will not cause problems either, it consists of a small number of large zombies (no special attacks!).
4th wave - a bunch of exploding zombies. There are two options to survive it - use a shield, or remove enough HP from the boss so that he starts spinning and throwing dynamite (thus killing all enemies), meanwhile hiding from below.
5th wave - a bunch of fast zombies. The safest place is closer to the center.
Accordingly, you need to survive them, and attack the boss during this. A lot of HP can be removed from him if, while using the shield, you take a minigun (or any other weapon, but the effect will be much less) and fire the entire burst close. A turret can also be a big help.
If a shield drops, you need to use it only after the start of the fourth wave.

Incorrect trophy description.

To obtain it, you do not need to go through the entire game without dying. When all levels are opened, it is necessary that in each level there are 0 deaths in its statistics. Go through the levels where you died separately and improve your results.