33 ratings
Fix for "Fatal error - Steam must be running to play this game"
By Sapee
Title says it all. Just a quick fix to the common problem.
For "hackers"
It's simple - Delete all changes you've made for the game.

That should do it for you.
For non-hackers
  • Restart Steam

  • If you are a steam beta participator, opt out (the most common solution)
    *settings > account > Steam participation

  • If you are not a steam beta participator, opt in (the most common solution)
    *settings > account > Steam participation

  • Verify integrity of your Payday 2 game cache
    *Library > select Payday 2 > properties > local files > verify integrity of game cache

  • Delete ClientRegistry.blob From your steam folder
    *Usually Computer > Local Disk (C:) > Program Files > Steam

  • Delete your mods (also the most common solution)

  • Reinstall Payday 2 (delete the whole Payday 2 steam folder and then verify integrity of game cache)

  • For AMD graphics users:
    Right click on desktop > configure switchable graphics > in All Applications select: Add Applications > find the Payday 2 game directory > open the payday2_win32_release.exe > in graphics setting column choose high performance.

  • Uninstall Comodo Antivirus if you're using it

  • Flush your DNS[]

  • Reinstall Steam

  • Run Steam while playing the game?

One of these should work for anyone having this problem. If not, then I have no idea. If both your Payday 2 game and the Steam app are like they should be (unmodded/completely reinstalled) and it doesn't work, then your best bet - besides Google - is to try Steam support or email/message Overkill's staff.
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Vajcochlp 338 Jan 26 @ 5:13am 
I done all these things and it doesn t works :(
Kirby 64 Dec 24, 2016 @ 7:10pm 
i have the geek comodo virus but youtube doesnt help its a virus not an anti virus
salty fries Dec 20, 2016 @ 6:23am 
Thanks so much!
Ghost harasser Dec 15, 2016 @ 1:59pm 
I have tried everything i deleted all my mods i just use them to get weapones and maskes i already have all dlc and i have restarted steam and done everything on this list ples help me.
|< /-\ 0 |_ /-\ [) : TH Dec 11, 2016 @ 12:57am 
Just restart Steam.
System32.HanaSong Nov 30, 2016 @ 4:24am 
this happened after our internet broke last night. i was playing offline the whole day until 6pm when the internet went back on i received this error. lol
Lucgonzo Nov 10, 2016 @ 9:00pm 
can we unistall steam without unistall the game using steam? ( i don't want to reinstall like 20 game XD )
JustADude Oct 8, 2016 @ 8:32am 
OMG Dude. Thank you so much. You are a lifesaver
chopper385 Oct 1, 2016 @ 11:59am 
You may add the Comodo Antivirus causing this error too. Uninstalling it resolved the issue.
As it has been confirmed on this thread.
Mr.Ghost1o1 Sep 11, 2016 @ 6:40am 
Ty so much