RagnarokOnline Patcher Lite (c) 2009-2017 Ai4rei/AN

Replacement for Gravity's RO patcher. Works faster and doesn't consume your entire memory for just seeing it crashing, aside from this, it works almost exactly as the official patcher does, so that it shouldn't break, unless Gravity changes something vital to their patcher. It is free of any cost and works on every 32-bit and 64-bit Microsoft* Windows* platform.

RO Patcher Lite for kRO (stable) Download (113 KB)
RO Patcher Lite for kRO RE (stable) Download (113 KB)
RO Patcher Lite for kRO RE (untested) Download (115 KB)
RO Patcher Lite Help 2.4.5 (incomplete) View Online


[2017-09-07] Missile testing at Gravity

The patch 2017-09-06_data_sakray_k.rgz updates the binkw32.dll responsible for bink video rendering in a way, that breaks old clients. If that applies to you, here is the old one.

[2017-05-25] Release

This release updates kRO patch information to reflect a change in the patch transfer protocol (HTTP). This update is needed to continue receiving new kRO patches whether you use the mirror server or not.

[2017-04-01] Release

This release adds support for GRF resets employed on sakray servers and fixes a bunch of various issues, among others, patch failures caused by non-standard file attributes on NT platforms.

Older entries

Can be found in the news archives.


As some countries seem blocked from using the official kRO patch server, the patcher offers tamper-resistant patch download from community contributed mirrors as fall-back mechanism from version 2.4.5 onwards. Anyone willing is free to apply for inclusion into the list of approved mirrors. Patches served through mirrors are subject to delayed release due to technical reasons.


On Windows 98 On Windows XP On Windows 7 Overall progress in task button on Windows 7 On Windows 8 On Windows 10, with patches from mirror patch server On Debian 5.0.4 Lenny (WINE) On Mac OS X (WINE) Nightly RSU/2.0 with basic skin support disguising as official patcher Liniris (alpha), console version for BeOS, Unix and Linux Manual patching with RO Patcher Lite (YouTube Video)


Do not provide mirrors for the downloads below, you will end up with an outdated version quickly. Do not hot-link to the downloads either for the very same reason. Link to this section. Thank you.

Latest release

kRO RAG (113KB)

kRO RE (113KB)

Full Bundle ( bRO, fRO, iRO, idRO, jRO, kRO & twRO ) (1.3MB)

Latest nightly (untested) NIGHTLY (115KB)

Previous versions

Use of these is at your own risk. They are mainly for archaeological research.


You are encouraged to use the bbs for submitting translations, requesting support or reporting bugs. Feedback on RO Patcher Lite, whether positive or negative, is more than appreciated.