How can I redeem GOG codes? does this involve purchasing a scratch card?
To redeem a GOG code, simply click the REDEEM CODE
link at the bottom of every page.
As for how to acquire a GOG code; the only legal way (aside from a fluke Humble Bundle title last year)
, is directly from GOG or, in the case of a gift, a current GOG member. These codes are digital only, so there are no scratch cards or other types of physical GOG codes. If you somehow acquired a GOG code from a non-GOG source, please be advised that codes like that are not valid and they may not be able to be redeemed.
If you have any further questions related to GOG codes or any other facet of GOG's business, you might want to check out the Website FAQ