GOG 2nd Class Helper v2.2
Adds information about whether or not a game is on the list of Games that treat GOG customers as 2nd Class at https://docs.google.com/spreadsheets/d/1zjwUN1mtJdCkgtTDRB2IoFp7PP41fraY-oFNY00fEkI/
Note: Only works on the standard versions of games, ie. not on "Complete" editions, etc.
Source code available at: https://github.com/poacher2k/gog-2nd-class-ext
The list is not maintained by myself, nor am I affiliated with GOG in any way.