Diablo 4 Not Launching on Steam

If you can’t launch Diablo 4 on Steam, don’t worry, there’s an easy fix! Diablo 4 Season 2 is now live, and it comes stacked with new content. Season of Blood brings a myriad of quality-of-life improvements, and new gameplay mechanics to dive into. On top of it, the game is also launching on Steam! However, it seems that many players are having problems when trying to launch the game. Here’s a possible fix if Diablo 4 is not launching on Steam, with few possible solutions.

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Diablo 4 Won’t Start on Steam

UPDATE: Diablo 4 Season 2 Season of Blood has been delayed for a couple of hours due to some unforeseen issues. Hence, the game’s launch on Steam will also be delayed for a couple of hours. We will update the article once we have more information about the potential issues and new release time.

We've encountered some complications and will be delaying Season of Blood’s start time a few hours to remedy these issues.

We'll share updates as soon as we have them. We appreciate your patience.
— Diablo (@Diablo) October 17, 2023

How to Fix Diablo 4 is Not Launching on Steam Issue

Diablo 4 Season 2, titled “Season of Blood“, is one of the most important moments for Blizzard’s latest action RPG title. After the game’s massive launch, Diablo 4 has experienced a rather steep decline in player numbers. Simply put, the RPG’s endgame content and loop are simply not that fun for players who like to grind this kind of game. Hence, there’s a lot at stake for Blizzard here. One of the new ways to try to attract new players is via Steam, the most popular PC gaming store online.

Diablo 4 releases on Steam on Tuesday, October 17th, at 7 pm CEST / 6 pm BST / 1 pm EDT / 10 am PDT. That’s when Season 2 starts as well. Hence, if you can not play Diablo 4 on Steam before this time, that’s because the game didn’t launch yet. Another important thing is that you need to own Diablo 4 on Steam if you want to play it on Steam. If you own the game on Battle.net, you will only be able to play the game there, not on Steam. With these two things out of the way, if you still can not play the game on Steam, let’s see what you can do.

Restart Steam

A simple and effective way to fix the problem of Diablo 4 not launching on Steam is to refresh your client. Sometimes, Steam does not update the game status in time, so you need to restart it to see the game ready to play. You may have to do this several times, or even reboot your computer if necessary.

Log in and Out of Your Account

Another possible way to solve the problem is to sign out of your Steam account, restart it, and sign back in. This will refresh the data when you log in again and might trigger Diablo 4 to become accessible. You can try doing this multiple times if it doesn’t work right away. If Diablo 4 still won’t start on Steam, keep reading.

Reboot Your Network Device to Fix Diablo 4 Not Launching

A common reason for poor Internet performance is a problem with your router or other network device. This can prevent you from playing Diablo 4 on Steam if your internet is down. To solve this problem, you can try to power-cycle your router, which means turning it off and on again. This can help to restore a stable connection. You can also reset your router to its factory settings to fix any configuration issues and update your router firmware. For more details, please contact your Internet provider and router manufacturer. Here are the steps to power-cycle your router:

Shut down your router completely.
Unplug the cable from the wall.
Leave it unplugged for approximately 2 minutes.
Plug it back in and turn it on.

Port Forward Your Router for Diablo 4

If Modern Warfare 3 beta is not launching on Steam of Battle.net, port forwarding might be a reasonable option. Check out this guide for more details on how to do that. This will ensure that your game does not have hurdles while trying to connect to the servers.

Whitelist Diablo 4 in Your Antivirus and Firewall Apps

To ensure that your antivirus and firewall programs do not block Diablo 4 from accessing the internet, you need to add it to their whitelist. This will let them recognize D4 as a safe application and allow it to communicate with the servers. If you don’t do this, you may encounter problems when trying to launch Diablo IV on Steam.

Verify Diablo 4 Files

If Diablo 4 is not launching on Steam, the issues might have been caused by an unfinished installation, or missing or corrupted files. This instability can lead to the Diablo 4 not starting on Steam issue. Thus, you’ll need to make sure that everything is installed properly by verifying D4 files. Follow the instructions below to verify Diablo IV game files:

Right-click on Diablo IV in your Steam library.
Select “Properties…”.
Select the “Local Files” tab.
Click on the ” Verify integrity of game files..”.
Allow Steam to do its work.
When the process is complete, restart your PC.
Launch Steam, and start Diablo 4.

Release and Renew your IP & Flush your DNS to Fix Diablo 4 Not Launching on Steam

Our last resort asks for a bit more technical knowledge on your side, but it is often proven to be a great solution for connection issues. However, if you follow the process below, you might be able to fix Modern Warfare 3 not starting issue. Here’s what you need to do:

While on the desktop, press Windows Key and type CMD.
Right-click Command Prompt and select Run as administrator.
Type ipconfig /release in the command prompt and press the Enter/Return key on your keyboard.
Wait a few seconds for a reply that the IP address has been released.
Type ipconfig /renew in the command prompt and press the Enter/Return key on your keyboard.
Wait a few seconds for a reply that the IP address has been re-established.
Type ipconfig /flushdns in the command prompt and press the Enter/Return key on your keyboard.
Close the command prompt and attempt to make a connection.