// JOURNAL · PUBLISHED MONTHLY

Writing from inside a real multiplayer production.

Monthly notes on the decisions we make while shipping ATONE and co-developing with partner studios. Replication, server architecture, performance, live ops — the kind of writing we wish we'd had earlier in our careers.

// LATESTISSUE 08
// ARCHIVE

Previously.

Moving ATONE to UE5 IRIS — and what broke first

We migrated ATONE's replication layer from Unreal's legacy system to IRIS over a seven-month window. Here's what we kept, what we rewrote, which tooling gaps surprised us, and what we'd tell a studio starting the same migration today.
18 MIN