Talk:Favors/@comment-732225-20190122171211/@comment-16533050-20190125000754

Incorrect.

Upgrades can be purchased from Griff, which anyone could access. Upgrades can be found on the various maps - not necessarily by just Corvo. Piero is merely the one who applies the upgrades to Corvo's accouterments.

With Daud's Favors, they are only available to Daud via his network. They can only be purchased before beginning the mission. If the player misses the favors they have to restart or replay the mission.