I've noticed in the community that there are a lot (legitimately good) open source games in development with Godot! The issue with open source games 5+ years ago and further is that they were really complicated and hard to get into, often written in C++ using frameworks like OpenGL. Having such a good open source engine makes it soooo much easier to find people willing to join projects.
One game I have my eye on is JDungeon, an open source 2D MMORPG made in Godot. It's still in very early alpha so there is barely a game to play right now, but it seems to be progressing quite nicely.