UPDATE: Mod block was a mistake, Techland says
UPDATE 2/2/15 4.20pm: Dying Light developer Techland has told Eurogamer that the game's latest PC patch was not intended to block mods, and that this change would soon be reverted.
"With the recent patch (1.2.1) on Steam we blocked cheating to make sure the game's PvP system (Be The Zombie) would not be abused. This, however, had the side-effect of hindering mod-makers from making changes to the game," Techland said in a statement.
"Creating obstacles for modders has never been our intention. We are now working on a quick patch that will re-enable common tweaks while stopping cheating in the game's multiplayer mode.
"At Techland, we have always supported the mod community, and loved seeing how our own game can be changed by the players. A big part of the original Dead Island's success was the passion and creativity of mod-makers from our community. We want the same for Dying Light."
There's no word on whether the mods which were already blocked will now be allowed.
ORIGINAL STORY 2/2/15 9.25am: Techland's new PC patch for zombie survival shooter Dying Light has restricted the ability to mod the game.
The patch notes for update 1.2.1 state that the fix was implemented to "block cheating by changing the game's data files".
But the mod files themselves have been targeted, too.
Fans had managed to disable the game's always-active film grain via a small 523-byte file, which was then shared via sites such as MediaFire and TinyUpload.
That file is now unavailable - it has been removed due to a anti-piracy claim by the Electronic Software Association (ESA) using the Digital Millennium Copyright Act (DMCA).
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Reddit users discovered the DMCA ruling and quickly spread word of the find. But it is unclear whether the claim originates from developer Techland or publisher Warner Bros - or both.
Previous Techland title Dead Island supported an extensive array of mods - the studio's upcoming demon hack-and-slash game Hellraid was originally born out of a Dead Island gun mod.
We've contacted Techland for more information.