Sentinel Armor is an optional helping hand that players can accept only after they die for the third time during a boss fight in Doom Eternal. It gives players super-reinforced armor that massively reduces incoming damage for the player.

How do you use Sentinel armor in Doom eternal?

Just hop on over and you'll find the sentinel armor there. To wear it, you'll need at least two sentinel batteries. You obtain these through various missions or by completing challenges, so once you've got the batteries, return to this secret location to unlock the armor.

What is the best armor in Doom eternal?