The Blue Screen of Death (abbreviated BSoD or WTFomgBLUESTD), also known as The Blue Screen of Doom, the "Blue Screen of Fun" or "Phatul Exception: The WRECKening", the great blue yonder is an award-winning game first developed in 1995 by Microsoft. Along with HTTP 404 - File Not Found, a hugely successful epic Internet MMORPG developed by Microsoft, the Blue Screen of Death ranks among the greatest computer games of all time. The game simulates a "system error" and displays a series of nonsensical hexadecimal codes for the player to decipher. Since its inception in 1995, BSoD has maintained its position as the most played computer game ever, and is a cornerstone of the Microsoft Corporation.