Since this is a place were many developers - aspiring or veterans - come together, I have both a request and an offer:

If you're creating a game, why not donate a part to a charitable cause you like?
If you have a game that actually donates some of it proceeds (doesn't matter how much), we'll advertise for it!

Our group Charity Games has over 500 members, and we're active on social media too, so I'm sure we could reach some people who want to vote for and support your game. And we have a site with a list of charity games and supporters.

We also have a Greenlight collection for do-good games: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=755046114

If you're interested or already have a "charity game" which we didn't add to our lists, leave a message, add me, whatever! Have a good day!