I'm usually a fan of open source games but rarely do they manage to be actually great. People like giving recommendations like Super Tux Kart that haven't aged well and don't play well. What are some open source games that are legitimately good that I've missed?
One Hour One Life is open source, it is a 2D hand drawn survival game where you have 1 real life houre to live from a baby to an elder and contribute to the player-made society in your life as best you can.
You have to pay for an account on the official servers, but i recommend you do to support the development.
Not sure if the dev accepts community patches or not, but the game is public domain license.