Para elevares o thieves guild tens de fazer pelo menos 5 missoes de thieves em cada hold e depois ser-te-ão dadas uma quest especial por cada hold, quando concluires os 4 holds principais sem contar com Riften que ja é controlado pelos thieves, o guild estará recuperado e recebes o achiv. acho que a quest No Stone Unturned (
http://www.uesp.net/wiki/Skyrim:No_Stone_Unturned) tb conta, mas n tenho a certeza.
ps: aqui vai a explicação em inglês pois n tive paciencia em traduzir...
Upgrading the Thieves GuildWhen doing Delvin or Vex's additional jobs, you need to head out to four different cities;
Markarth,
Windhelm,
Whiterun, and
Solitude. After completing five additional jobs in a single city, you'll be assigned a special job for that city. After completing each special job, the condition of The Ragged Flagon will be improved and a new merchant will move into the main chamber. Additionally, completing a quest will enable you to use the guild's influence to pay a reduced bounty when getting arrested in the corresponding city.
Upon completion of the main Thieves Guild questline, a Shrine of Nocturnal will appear in The Ragged Flagon - Cistern. When all quests are completed, the furniture in The Ragged Flagon will be completely replaced with more upscale variants, along with new additional furniture and decorations.
embora já sejamos uma coisa parecida.
