Serious Sam 4
54 Achievements
15-20h
GOG
The Informant?
What if you could talk to the monsters?
19.6%
How to unlock the The Informant? achievement in Serious Sam 4 - Definitive Guide
This is the achievement for beating the mission "Viva La Resistance" it is story related and cannot be missed. 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.