RarxNos
Custom NosTale private server in C# / .NET 8 — 2,000+ concurrent players, custom dungeons, raid system, partner SPs.
Forked an existing emulator (Zipline-style C#/.NET 8 stack) and rebuilt 40% of the codebase: custom partner SPs, raid system, custom dungeons, in-game economy and Stripe-backed donation flow.
Reverse-engineered the proprietary `NT Data 24` binary container format used by the client (NosTale's NSipData / NSgtdData / NSlangData archives) to inject custom item sprites, skill descriptions and new items without recompiling the closed-source game executable.
Built a surgical Python patcher for the encrypted `.NOS` archives so single-field edits ship a diff of a few bytes instead of repacking 18 MB — survived an emergency revert when a full repack broke item rendering for all clients.
Wrote a Next.js admin panel so non-engineer staff can edit drops, raids, custom dungeons and event timers through forms — no SSH, no XML, hot-reloads in seconds.