https://jbo.itch.io/the-first-greek-odyssey
I have this game it has themes of slavery and gambling in a casino at times but is handled in a mature manner. I hope that is ok.
If, its not I have a mini game I can contribute I am very passionate about contributing to this cause.
I hope I am not too late.
Sorry I am late
https://rbatistadelima.itch.io/westervania
https://rbatistadelima.itch.io/pixel-of-life
(second link fixed, thanks ceege)
https://itch.io/b/902/indie-bundle-for-palestinian-aid
click on this link above, and click on: "Buy all for $5.00", then a box will open with the list of available games, in addition to the possibility for you to contribute with a higher amount (minimum is 5 dollars but, you can always put an extra one :3)
PS: You need a credit card or a Paypal account