Infiltration

The Infiltration badge is a combat milestone rated 2 stars and worth 4 diamonds. The requirement is to defeat the Cultist Stronghold for the first time, a fortified enemy camp guarded by groups of hostile cultists. This is a deliberate assault objective, so it rewards preparation and aggression far more than passive survival.

Before you attack, gear up properly: bring a strong melee weapon or, ideally, a firearm with stocked ammo, plus healing food to recover between fights. The cultists tend to swarm and can overwhelm an underequipped player, so clearing the stronghold solo is risky. Bringing teammates makes a huge difference, letting you split aggro and push deeper while one player covers retreats.

Because it only needs to be done once, you can treat it as a focused mid-to-late game raid rather than a repeated grind. Approach during the day so darkness does not stack extra threats on top of the defenders, eliminate the outer guards first, then press into the core. Watch your health bar closely and disengage to heal rather than trading blows when surrounded. Clearing it cleanly secures the 4-diamond reward and any loot inside.