This is a game that I've never actually played or heard the name of, but I heard someone describe it on a podcast. There's a moment in the game where you press the button to bring up the map and instead of the map, a picture of an sacrificial animal or something like that comes up.
Any hints on the poadcast name, platform, date, etc? It is vague enough to be one of the hundreds of scary maze flash games that throw up a spooky image and loud noise when you get close to the end.
Edit: Could it be one of the many Sanity Effects from Eternal Darkness?