Expert Certificate is an unlockable trinket in Damnation, a mod for The Binding of Isaac.

+0.1 speed.
+0.1 fire rate.
+0.1 flat damage.
+0.1 range.
+0.1 shotspeed.
+0.1 luck.

For each completion marks P1 has, additionally adds +0.3 to a random stat except shotspeed.
One hard mode completion mark count as 2 marks.

If the Dead God is achieved in the file, additionally adds ×1.15 to all stats.

Defeat Mom.

• Download Damnation from the Steam Workshop.