Hey! I've been working on this on and off for a while and finally got it to a point I'm happy sharing — GridCross, a real-time multiplayer territory-control game.
The rules are simple: click an empty cell and you claim it plus its up/down/left/right neighbors (up to 5 cells at once). If one of those neighbors happens to be an opponent's cell, it becomes your territory too. And if you manage to fully surround a chunk of their territory, the whole thing flips to your side at once. If you've played Go, the surround-and-capture feel will be familiar right away — just faster-paced and a lot less to learn going in, most games end in a few minutes.
It's got online matchmaking with ratings if you want something competitive, an AI with 7 difficulty levels if you just want to practice, and local 2-player if someone's sitting next to you. Also fully bilingual (English/Korean), so feel free to try it either way.
https://boseongyeom.itch.io/gridcross
Still actively improving it, so if you give it a shot I'd genuinely like to know what you think — especially if anything felt confusing.