|Release date||12 December 2002 (Update)|
|Location||At the end of Yanille Agility Dungeon.|
|Examine|| A bold knight famed for his travels.|
|Notable features||Warns players about Salarin the Twisted.|
Sigbert the Adventurer is located in the Yanille Agility Dungeon and will warn players about the power of Salarin the Twisted. Salarin is vulnerable only to attacks from the mind, meaning that he can only be killed by strike spells which requires mind runes (including the "special attack" of the Dragonfire shield ).
- Sigbert appears to be a follower of Saradomin, as he has the symbol of Saradomin on his chest.