Hey man, I’ve tried a bunch of different CS 1.6 builds over the years, and one that actually surprised me in a good way is the CS 1.6 Minecraft edition. It’s pretty fun, has a unique vibe, and still runs smooth without breaking the classic feel. I’ve been using this one myself lately. You can grab it here: https://cs-install.com/cs16-minecraft
The install is simple, no weird stuff bundled, and servers work fine. If you want something fresh but still nostalgic, definitely worth checking out.