Portal Easter Egg - Hidden 300 Reference
This egg is hidden really well. If you go to portal\materials\models\props_facemovie\wet_floor_sign folder of the game, you'll see a lone file called wet_floor_sign.vtf. Open it with a VTF File Viewer, like VTF Explorer and you'll see an entertaining meme. I haven't encountered that sign in the game but if I do, I'll post a picture of it here later and where to find it.
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Portal for PC, some kind of a VTF file viewer
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|wet floor sign.
||A real version of the sparta sign to give you an idea.
Do you have another one? Send us a picture or video of this Egg!