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Hamachi appears to still be a thing, but I would prefer something open source.
Tailscale sadly doesn't support multicast, which I'm assuming most games use for LAN discovery.
ZeroTier maybe?
In a way it was even better because then nobody had to loose, and everyone believed they were winning.
It's free and fun, but definitely humbling if you consider yourself a master strategist:
https://play0ad.com/