Companion Vilja is a fan Mod for the PC version of the game The Elder Scrolls IV: Oblivion, created by Emma and CDCooley.
The young nord alchemist Vilja has her own mission in Cyrodiil - but she needs your help! Will you let her tag along? Will you let your Cyrodiil life be changed by a talkative, curious and unpredictable girl who might be a nuisance at times, but who also will offer a strong, indepth friendship, and later on also optional romance.
Terry Pratchett was a fan of video games for a long time, even having Doom running on on of his computer screens in his office. Terry contacted the creators of the Vilja mod, initially just to praise them for their work, but they began regularly contacting each other. Terry made multiple suggestions for numerous activities, items, quests and wrote multiple lines of dialogue for the character. There are several references to Snuff in the content by Terry as it was the book that he was working on at the time and the mod creators were even invited to that books launch party.