overwatch-nexon-linux-fix — Overwatch (Nexon KR) error 0xE01300B0 on Linux

Fixes Overwatch failing to start under Proton/Wine since the 2026-08-12 Nexon transfer (Blizzard error 0xE01300B0, inner exception 0xC06D007E). Wine’s crypt32 stops at a self-signed root instead of the cross-signed chain; the wrapper adds the cross-certificate to the prefix and hides that root from the game. Nothing is patched or disabled.

Status: active
Verified: 2026-11-09 (0 days before this build)
How: Summary checked against the repository README on 2026-11-09. Tested environments are those the README states.
Applies to: needs bubblewrap, openssl, python3
untested Lutris, Heroic, Bottles, plain wine (same mechanism)
verified Fedora 44, kernel 7.1.8, KDE Plasma Wayland; RX 7700 XT, Mesa 26.1.6; GE-Proton11-5 / Proton Experimental 11.0 (steamrt4); Battle.net as a non-Steam game
Repository: github.com/seolcu/overwatch-nexon-linux-fix
License: MIT

Symptom

Overwatch launched from Battle.net shows a black window, then two dialogs:

Overwatch has encountered a critical error during startup.
Please reinstall the game and try again.

설치한 파일에 문제가 있습니다. 문제가 지속되면 게임을 다시 설치해 주십시오.
(0xE01300B0)

Reinstalling, Scan and Repair, changing Proton versions and clearing shader caches do not help. If the code in the dialog is not 0xE01300B0, the cause is different.

Cause

Since the transfer to Nexon, a game DLL is signed by NEXON Korea Corporation through a chain that Windows validates via a cross-certificate. Wine’s CertGetCertificateChain stops at the first trusted self-signed root it finds and never considers the cross-signed path, so the signature check fails. In addition, CertCreateCertificateChainEngine does not implement hExclusiveRoot or hRestrictedRoot; both return E_INVALIDARG.

Fix

git clone https://github.com/seolcu/overwatch-nexon-linux-fix.git
cd overwatch-nexon-linux-fix
./overwatch-nexon-linux-fix.sh install

Then set the Steam launch options of the Battle.net non-Steam shortcut to:

/full/path/overwatch-nexon-linux-fix.sh run %command%

install finds the prefix (Steam, Lutris, Bottles, Heroic, plain wine), backs up system.reg, and builds a trust list under ~/.local/share/overwatch-nexon-fix/certs. The host trust store is not modified. The full analysis is in the repository’s docs/ANALYSIS.md.

Search terms

0xE01300B0
0xC06D007E
Overwatch has encountered a critical error during startup.
설치한 파일에 문제가 있습니다
오버워치 넥슨 리눅스
Overwatch Nexon Proton
Steam Deck Overwatch Korea

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Published 2026-11-09 · last changed 2026-11-09 · Markdown source