Darksiders 2 Save File Location

or sometimes:

Save files between these two versions are not cross-compatible without third-party hex editors. If you try to copy an original save into the Deathinitive folder, the game will ignore it or crash.

You cannot do this natively. Use a tool like DS2SaveEditor (available on Nexus Mods/VitaBunker). You must strip the GFWL header and rebuild the file for Deathinitive. It is a technical process; consider simply replaying the first few hours.

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or sometimes:

Save files between these two versions are not cross-compatible without third-party hex editors. If you try to copy an original save into the Deathinitive folder, the game will ignore it or crash.

You cannot do this natively. Use a tool like DS2SaveEditor (available on Nexus Mods/VitaBunker). You must strip the GFWL header and rebuild the file for Deathinitive. It is a technical process; consider simply replaying the first few hours.