A bit more detail would be nice 
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“organize our netcode”
– C++ or Blueprints? How advanced do you need, as in, better client-side prediction than default one (with custom packeted data sent back and forth) or you just need everything to work
– Server type? Dedicated / P2P ? -
“gunplay”
– 3rd person / 1st person?
– Need to build shooting and animation blueprints from scratch?