Mirror Networking
An open high-level Unity library with NetworkBehaviour, synchronized variables, commands, scenes, and replaceable transports.
Why use it
Its UNet-style API quickly establishes co-op games and dedicated servers with many community extensions.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
What to check
High-latency prediction and large scale need extra solutions; regression-test Weaver-generated code during upgrades.