Fix Doom: The Dark Ages DLC Chain Spear Throw Button Prompt

The Chain Spear Throw in Doom: The Dark Ages DLC is a crucial ability for ripping through enemies, but a nasty bug has players staring at a useless '??' prompt instead of the correct button icon. The ability won't fire, and you're left mashing buttons while a Hell Knight turns you into a fine paste. Good news: the community has zeroed in on a reliable Doom Dark Ages Chain Spear Throw button prompt fix, and it's easier to pull off than a perfect parry.

What is the Chain Spear Throw button prompt bug?

The bug manifests as a broken button prompt directly on the HUD. Where you'd normally see a controller face button (like 'X' or 'A') or a keyboard key, the game displays two question marks: '??'. According to VGC's guide, the prompt appears correctly for other actions, but the Chain Spear Throw specifically gets stuck. This means you can't execute the throw at all, locking you out of a core combat mechanic right when the DLC's encounters demand it.

The issue affects both gamepad and keyboard players, though it's most commonly reported on controllers. It seems to hit after the DLC is installed, regardless of whether you're running a fresh save or continuing an existing campaign. The visual glitch is obvious the moment you acquire the ability - you'll see that baffling '??' and immediately know something's off.

Step-by-step fix for the Chain Spear Throw prompt glitch

The workaround, as detailed by VGC's guide, boils down to forcing the game to re-read your control bindings. It's not a full reinstall or a config-file hack - just a quick remap. Here's exactly how to do it:

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1. Pause the game and open the Settings menu. Navigate to the Controls tab. 2. Scroll down to the 'Chain Spear Throw' action. You'll likely see the binding listed as 'None' or a garbled label. 3. Select the binding and clear it. On most platforms, you'll hold the 'Clear' button (usually 'Y' on Xbox, 'Triangle' on PlayStation, or a right-click on PC). 4. Reassign the action to your preferred button. Press the button you want to use - a standard face button works fine. 5. Back out of the menu and resume the game. The prompt should now display the correct icon, and the ability will function.

If the prompt still shows '??' after reassigning, try resetting all controls to default. There's a 'Reset to Default' option at the bottom of the Controls screen. This wipes any custom mappings, so you might need to re-tweak your sensitivity afterward, but it clears the corrupted binding that triggers the bug.

Why this bug happens and will it be patched?

While neither id Software nor Bethesda have released an official statement, the behavior points to a control mapping corruption. The DLC likely introduces a new action entry that doesn't inherit the base game's bindings correctly, or a cloud-save sync overwrites it with a blank value. The '??' is the game's fallback when it can't find a valid input definition.

As of early July 2026, there's no confirmed patch date. The Doom community has flagged the issue on the official subreddit and Bethesda's support forums, so it's almost certainly on the developers' radar. Given how quickly id Software has addressed similar launch hiccups in the past, a hotfix is likely within weeks. Until then, the manual remap is your best friend.

Alternative controller fixes for Doom: The Dark Ages

If the remap trick doesn't stick, or you're running into other controller weirdness, a few broader PC-gaming fixes can help. These are less about the specific prompt bug and more about ensuring your controller setup isn't fighting the game.

First, verify the integrity of your game files. On Steam, right-click Doom: The Dark Ages, go to Properties > Installed Files > Verify integrity of game files. This catches any missing or corrupted data. After that, check your controller drivers. On Windows, open Device Manager, expand 'Human Interface Devices', find your controller, and update the driver. If you're using a wireless adapter, unplug and reconnect it.

Steam Input can also cause conflicts. Go to the game's Properties > Controller, and try toggling between 'Enable Steam Input' and 'Disable Steam Input'. Some players find that disabling Steam Input forces the game to use its native controller support, which avoids button-prompt mismatches. If you're on a PlayStation controller, make sure it's not being recognized as a generic DirectInput device - enable Steam's PlayStation Configuration Support in Steam's main controller settings if needed.