Serious Sam 4
54 Achievements
15-20h
GOG
Volcano Antagonizer
Die HAARP With A Vengeance.
33.0%
How to unlock the Volcano Antagonizer achievement in Serious Sam 4 - Definitive Guide
This achievement will pop upon the completion of the mission "The Four horsemen of the apocalypse". To make this easier make sure you have infinite ammo turned on and even tourism difficulty or play on co-op and set respawn timer to 0.