-windowed launch option not working

[Camilo]

Expected behavior:​

Using the -windowed flag in launch options runs the game in windowed mode

Observed behavior:​

Game flashes a window of desired resolution briefly before switching to fullscreen. (Game does not render in fullscreen on my system).

Workaround:​

Setting the ⁨`setting.fullscreen`⁩ boolean in ⁨`SteamLibrary/steamapps/common/Deadlock/game/citadel/cfg/video.txt`⁩ to 0

Possible fix:​

Make sure the -windowed launch option correctly updates the video.txt file.

Processor Information:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 5 5600X 6-Core Processor

Operating System:
"Arch Linux" (64 bit)
Kernel Name: Linux
Kernel Version: 6.18.7-arch1-1
X Server Vendor: The X.Org Foundation
X Server Release: 12101021
X Window Manager: dwm
Steam Runtime Version: steam-runtime_1.0.20251202.187498

Video Card:
Driver: AMD AMD Radeon RX 5700 XT (radeonsi, navi10, LLVM 21.1.6, DRM 3.64, 6.18.7-arch1-1)
Driver Version: 4.6 (Compatibility Profile) Mesa 25.3.4-arch1.1