I see a lot of people asking about other fan games that are similar to Insurgence or Z/O. I’ll start with completed fan games and then give you some others that are in various stages of betas/demos. There are probably a few I left out, so feel free to leave them in the comments.
1 Pokemon Gray Topaz (complete)
I’m currently playing this game and enjoying it a lot. Looks good, unique story line, and it’s actually a completed game.
2 Pokemon Reborn (13 GYMS with 5 more to come later!)
I have yet to play this game, but have heard nothing but great things about it. People say the story line is dark, but incredibly well done. 50 hours of gameplay with 13 different typed gyms, choice of 18 starters, and much much more.
3 Pokemon Uranium (beta up to 7th gym)
Fantastic fan game full of very well made fakemon. I found the story to be refreshing and rather interesting. Can get a bit challenging levelwise around the 4th gym.
4 Pokemon Ethereal Gates (beta up to 3rd gym)
Talk about a beautiful fan game. The tile sets for this game are hands down some of the best I’ve ever seen in a Pokemon game, official or fan made. There isn’t much content wise in the first demo, but this game is definitively worth checking out.
5 Pokemon Alabaster (beta up to 3rd gym)
I have yet to try this one out, but it’s on my list to play. Another good looking game in the middle of development, but the creators boast about 10-12 hours of play time just to finish the story up to the 3rd gym.
6 Pokemon Chaos (beta up to 3rd gym)
First fan game I’ve seen to go full DS style with two screens. Also has a pretty good story. My only annoyance is that you can only play the game in the smallest graphics option. After awhile it can be a bit of a strain on the eyes to play on your computer screen.