| The Shadow of Yserbius | |
|---|---|
 | |
| Developer(s) | Ybarra Productions |
| Publisher(s) | Sierra On-Line |
| Platform(s) | MS-DOS |
| Release | 1991 (incl. with TSN) 1992 (offline port by Sierra) 1994/5 (incl. with INN) |
| Genre(s) | MUD RPG |
| Mode(s) | Single-player, multiplayer |
The Shadow of Yserbius, originally published by Sierra On-Line and developed by Joe Ybarra of Ybarra Productions, was the first of three graphical MUDs for the online community. The Shadow of Yserbius and its successors remained online until 1996, when America Online purchased the rights from AT&T for an undisclosed price (rumored to be $40 million). AOL soon abandoned The Shadow of Yserbius, which was a competitor to its existing online RPG Neverwinter Nights.[citation needed]
In late 2007, the ImagiNation Revival Project succeeded in resurrecting the long-dormant ImagiNation Network by using the original client software coupled with DOSBox. The Shadow of Yserbius was again available for online play with all features, graphics, sounds, and such fully intact and functional. Macros were fully supported and compatibility with old character and map files was enabled for TSN/INN versions 2.4 and higher. In early 2016, the server was shut down making online play not possible until recently.[citation needed]
The game was followed by two sequels: The Fates of Twinion (1993) and The Ruins of Cawdor (1995).