Incase you need them or GOG can get rights to add as 'free' goodies:

http://ideafintl.com/rebirth2/pc_manual/rebirth2_m.pdf

http://www.ideafintl.com/rebirth3/pc_manual/ReBirth3_M.pdf

Did you send a ticket about that ? Generally they will add those type of things :)

But this is generally always a good idea to send it to them. If it's something that ain't 'restriced' - they will add it. If it is - maybe they will get to agreement with IF for them.

And I am noticed GOG using different packaging for games too . A while ago they package them with manuals even they are seperate manuals in extras HDNRB1 for example . Now they changed it .

Isn't it something more of a game thing? Like - the game itself always 'installed' the manual and the like.