MAP31: Pharaoh (TNT: Evilution)

MAP31: Pharaoh is the first secret map of TNT: Evilution and can be accessed from MAP15.

Yellow keycard bug
In early released versions of Evilution, this map has a tiny but crucial bug - the yellow keycard simply isn't there. Team TNT quickly released a patch for the WAD that fixes this issue, which can be found on their website (among other places). Skilled players also found a couple of interesting albeit challenging ways to complete the level without the yellow key, involving hitting the switch on the right throne from its edge above, or wedging the player through the key-color bars in the same room to hit the switches therein.