Shadow of Yserbius is a classic dungeon-crawling RPG released for DOS in the early 1990s. Developed by Ybarra Productions and published by Sierra On-Line, it offered both solo and multiplayer gameplay through The ImagiNation Network. Players explored the mystical volcano of Yserbius, battling monsters, solving puzzles, and uncovering secrets. Its turn-based combat, rich character customization, and early online features made it a pioneer in multiplayer RPG experiences.