Desperados III
36 Achievements
Inferno
In the first part of the mission, burn 5 guards at once with oil traps.
2.5%
How to unlock the Inferno achievement in Desperados III - Definitive Guide
No need to work out a way to lure 5 guards at once into a trap, just switch to nonlethal and go around knocking out guards. You can use Hector for this since he can knock out the long coats and has fast carry speed. Use showdown with both characters to handle any groups of two.
Form a pile of tied up guards (make sure not to drop them on bushes or the body will disappear) and once the area is clear all you need to do is bring them to the oil trap and dump them in the middle. Go back to the bonfire to grab a torch, light them up and you can add this to the list of cruel and unusual things you've done for achievements.
This can only be earned during the fifth mission, "The Magnificent Five", at O'Hara Ranch.
Throughout this mission you'll notice several shimmering puddles on the ground (oil traps) that can be ignited by throwing a torch at them. However, while playing naturally, you'll never get more than three enemies in one oil trap's radius, so you'll need to set this up.
The easiest way to do this is to clear out an area near an oil trap by knocking out enemies. You can then tie them up and leave them in the oil traps. Once you've gathered your five victims simply set fire to the oil trap by throwing a torch.
Note: Your characters will use lethal force by default. To change this hold and then press . Repeat this for each character.
We knit three of them in the place where they give out bottles, and we knit three more near Hector.
We clean the area, drag the bodies and burn them.