Valve May Soon Introduce Peer-to-Peer Steam Downloads Across LAN

You can tinker with this feature now, but be warned, it's still very early in development.

Valve Steam Link Review

News - Portal 2 Official Blog

How to play Counter Strike 1.6 over LAN - Quora

Server - Is LAN possible Tripwire Interactive Forums

Copy Steam Games via Peer-to-Peer Transfers using LAN

A closer look at Steam's local network cache proxying protocol

3 Ways to Set Up a Counter Strike LAN Game - wikiHow

Long Awaited LAN Transfers have Finally Landed on the Steam Deck with March 15th Stable Client Update

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We Can Play Diablo II: Resurrected on Aug. 13, But Local Multiplayer Support Dropped

Steam Community :: Guide :: SCP: 5K - Dedicated Server Guide

Anyone seen this behavior recently with lancache.net's monolithic setup? Steam client is reaching out to non-local IP's about 50-75% of the time : r/lanparty