SteamPick one of the available card values.
For Slovakia, 0fiat sells the Steam darčeková karta as a euro Steam Wallet code in two sizes, €10 and €20. Steam is a digital platform for PC games. After you pay with crypto and the transaction confirms, the code is printed on screen for you to copy.
What you are buying is store credit. The card's terms explain that a Steam Wallet code is redeemed on your account, where it becomes Steam Wallet credit.