Game Development · Custom Engines & Others. Browse Why Did Ultima Online's Living Ecology Collapse When Players Arrived?, Why Did Cyberpunk 2077 Characters Stand in T-Pose Instead of Crashing?, Multiplayer Not Laggy but Keeps Kicking You Out? How Factorio Desyncs Really Happen, with requirements, routes and walkthrough steps.
Raph Koster, designer of Ultima Online's resource system, corrects the famous story: the ecology AI was disabled for radial-search and pathfinding cost, and the closed resource bank collapsed when players hoarded goods like wool shirts, leaving no wool to spawn more sheep.
At launch in December 2020, Cyberpunk 2077 characters froze in T-pose. Hotfix 1.05 fixed two named quests only, and patch 1.23 in June 2021 was still fixing T-pose spots. In 2024 engine lead Charles Tremblay said the team chose a visible T-pose over a hard crash when memory ran out.
Factorio multiplayer runs on deterministic lockstep: every player simulates the whole game locally and only actions cross the network, so any tiny difference is a desync. Friday Facts 340 traces two deep cases, a Serpent nil placeholder that changed table order and a unit-group speed value that was recalculated on load, plus the older pattern of hidden state, hash order and invariants.
Forager can run 5,000 instances at once, and lead programmer Gabe 'lazyeye' Weiner was hired to make that playable. Every instance was justified, so the fix was not fewer objects: cheaper representations where possible, cheaper checks first, work spread across frames, and a culling system that deactivates what the player cannot see — plus a second system to repair the 500-plus code calls the culling broke.
