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RagnarokOnline Patcher Lite (c) 2009-2021 Ai4rei/AN

RO Patcher Lite

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 4 (kRO) (stable) Download 32-bit / 64-bit
RO Patcher Lite 4 (kRO RE) (stable) Download 32-bit / 64-bit
RO Patcher Lite 4 (Full) (stable) Download 32-bit / 64-bit
RO Patcher Lite Help 2.4.5 (incomplete) View Online


[2021-05-21] Note on native 64-bit releases

Native 64-bit releases (built with MSVC 2019) have been pulled for investigation/questioning. Data is not at risk, but you are better off using the 32-bit version (built with MSVC 6) for now.

[2021-04-23] Release

This release fixes, among others, an issue that prevented updating jRO RAG, when there are more than one year worth of patches to apply.

[2021-02-19] Release

This major release contains a refreshed UI, completely reworked GRF engine, native 64-bit builds and other, far too many under-the-hood changes and bug fixes to mention them all, see included doc/history.txt for details.

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.

kRO Mirror Status


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)


Do not provide mirrors for the downloads below, you will end up with an outdated version quickly.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 (134KB, 32-bit)

kRO RE (134KB, 32-bit)

Full Bundle ( bRO, iRO, jRO, kRO & twRO ) (1054KB, 32-bit)

Previous versions

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