1. Yes you can play solo. There are plenty of people on this forum that play exclusively solo. It is your choice if you want to play solo or online with others. It all comes down to preference.

  2. No, not at all.

  3. No, not at all. If you want to play on an official server mods are not even an option anyway, or if you are playing on console then again, they are not an option. If you want to play solo, then it is up to you if you see something you like or not. But no, you do not ever have to use mods.

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