Issue Type (Required): Crash - On Launch Issue Description (Required): I hit play on steam, nothing changes, and button goes back to green. I have uninstalled Vermintide 2, deleted its Appdata, verified game files upwards of 3 times, reinstalled Easy Anticheat, and it still won’t work. It seems the…

Sorry to hear this. As the launcher is not opening from Steam, our launcher-related solutions may be of help, here: https://support.fatshark.se/hc/en-us/articles/360021423613--PC-How-to-Resolve-Vermintide-2-Launcher-Issues

great, the temporary launcher workaround worked, thank you! ngl im a bit miffed as that was the only solution I didnt try. 2 things; 1. It loads but its incredibly laggy with i reckon less than 20 fps when i typically run it above 60. 2. It says its a temporary workaround, what should I do now? runn…

@DF_Sweet_Potato , thanks for the update! I’m glad to hear the launcher workaround helps. Regarding performance issues, it’s possible that you may experience some stutters while shaders are being cached - but this should only be temporary and should stop after a few games. If performance issues pers…

Got it. Now the graphics are back and the fps is back, thankfully. Last thing; how do I make it start in modded realm? i exclusively play modded, and it will only start in offical(this is with the launcher workaround). Is there a launch option to autodirect me to the modded realm?

Glad the performance has picked up! Unfortunately Modded realm isn’t possible through the launcher workaround. As without the launcher it isn’t easy to toggle mods on/off, or change the launch order. Can you try to launch Vermintide 2 normally again and provide a new console log and your launcher …

Just to add to this, one of our developers has implemented additional options to the launcher workaround so that Modded realm can now be selected (it may require a Steam restart to be visible). Unfortunately, this does come with limitations in that mods cannot be added or re-arranged, but at the ver…

Perfect, thank you so very much! Hope you have a great day!

Ok I got time to try it, and when I run Bypass Launcher(modded) or Bypass Launcher DX12 (modded) I get a Backend Rejected the Challange Response error, error code -1. This is when it says its logging me in. Thank you for your continued help! I will be trying a windows reinstall today, and ill let …

I see, could you please provide your console log (if one is generated) from a session that you try to use the Modded realm launcher bypass and encounter the Backend Rejected the Challenge Response error? Thanks!

Game unable to start

Warhammer: Vermintide 2 Technical Support

DF_Sweet_Potato July 24, 2025, 9:13pm 12

Sorry about not doing so earlier:
console-2025-07-24-20.58.04-77e49544-14f9-4ac5-829b-68de4567410c.log (82.8 KB).

I followed the advice at this forum post, but it didn’t change anything: Backend Rejected the Challenge Response

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Game unable to start

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