The entirety of Twitch's source code with comment history "going back to its early beginnings"
Creator payout reports from 2019
Mobile, desktop and console Twitch clients
Proprietary SDKs and internal AWS services used by Twitch
"Every other property that Twitch owns" including IGDB and CurseForge
An unreleased Steam competitor, codenamed Vapor, from Amazon Game Studios
Twitch internal 'red teaming' tools (designed to improve security by having staff pretend to be hackers)