RagnarokOnline Patcher Lite (c) 2009-2018 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 (112 KB)
RO Patcher Lite for kRO RE (stable) Download (112 KB)
RO Patcher Lite for kRO RE (untested) Download (114 KB)
RO Patcher Lite Help 2.4.5 (incomplete) View Online


[2018-01-21] Release

This release fixes a potential crash due to wrong memory usage.

[2018-01-14] Release

This release adds iRO:Restart, kRO Zero and phRO, and updates jRO patch information. Fixes a super-random crash on super-modern systems.

[2017-12-07] Development updates

Currently there are only nightly releases for the insane ones. Recently the memory manager was replaced, which causes less memory to go to waste and makes exiting a bit quicker. The UI will remain more or less the same, most of the changes happen under the hood in preparation for new features. There are also plans to add support for new pRO and iRO:Restart, assuming they stay alive until the next stable release, which probably will not make it this year anymore.

[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.

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 (112KB)

kRO RE (112KB)

Full Bundle ( bRO, fRO, iRO, idRO, jRO, kRO & twRO ) (1.6MB)

Latest nightly (untested) NIGHTLY (114KB)

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.