Casualties: Unknown Guide

Leukocyte Overflow achievement

Last updated Unofficial fan guide

Steam description
Have 200% immunity
Players who have it
29.6%

How to unlock Leukocyte Overflow

Raise your immunity to 200%.

It's number 5 of 40 by how many players have it (Steam global stats, November 15, 2026).

Sources: Casualties: Unknown Wiki (Miraheze) · Steam Community

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