If you take "GfxD3D.dll not found" error on Serious Sam 2. This is solution:- Go to "Serious Sam 2/Bin" directory,
- Rename GfxOGL.dll to GfxD3D.dll.
Now you can join to game.
Serious Sam 3 BFE Russian to English Language Change
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If you take "GfxD3D.dll not found" error on Serious Sam 2. This is solution: