I'm trying to move away from service-based gaming, and I only really play two games, so that shouldn't bee too hard. I've found Terraria on GOG, but I'm trying to find a replacement for Counter Strike. Are there any good tactical shooters that don't require an account on an online service like Steam or Ubisoft? If you can't think of any tactical shooters, what about non-Quake-likes (like Xonotic)? I'm not a huge fan of movement shooters.