so I found a game that I want to buy, but you can only pay with PayPal or credit card.

My Dutch card doesn’t work with it so the only option is to use PayPal. But PayPal I also need to use a credit card.

Is there a way to buy the game with ideal or the ing app? Thank you!

I don't know about the situation in the Netherlands, but in Germany (and also in the USA) it is possible to link a PayPal account to a checking account.  That's what I would recommend, assuming you have a checking account.