Open Fortress Base
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⚠ Unverified Content ⚠
This page may contain unverifiable content based on rumors or 2nd-hand accounts/knowledge.
Open Fortress Base, not to be confused with Open Fortress, was an work-in-progress Source Development Kit developed by the Open Fortress team to give the TF2 Sourcemodding community a "clean base" to work with based off of reverse engineered TF2 leak.