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I tried installing it to another directory, running it as an admin, and deleting the physxloader dll. none of it works. i have the latest version of physx with a nvidia gtx 680
This question / problem has been solved by Waltoriousimage
I FOUND A SOLUTION! anyone who is having issues playing the game needs to see this

http://steamcommunity.com/app/1930/discussions/0/828923952147418710/

this person found a solution. now i can actually play the game.

it would be helpful if someone could post a message so i can mark my post as a solution.
Post edited December 13, 2012 by dachshundfan
This problem has been discussed before:

http://www.gog.com/forum/two_worlds/installation_short_question_ageia_physx/page1

Back then, you could just let the game install the old version of PhysX, and then download the latest one and install that over it. This worked when I played a couple of years ago. But from the link you posted, it sounds like the new versions of PhysX no longer contain the old runtimes, so that won't work anymore. Therefore, the solution you found is now the best one. Thanks for tracking that down!
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Waltorious: Therefore, the solution you found is now the best one. Thanks for tracking that down!
Actually, Nvidia provides an official solution, the Nvidia PhysX 9.12.1031 Legacy Driver. This has the files needed for Two Worlds and other older PhysX games.

Afterwards install the latest Nvidia PhysX System Software to ensure newer PhysX games will also work properly (this doesn't remove the Legacy Driver's files).
Post edited December 17, 2012 by Arkose
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Arkose: Afterwards install the latest Nvidia PhysX System Software to ensure newer PhysX games will also work properly (this doesn't remove the Legacy Driver's files).
Are you sure this step is necessary??

I just recently upgraded my Nvidia driver to the 12/29/2012 version (310.90) and was surprised to find when I went to play Two Worlds again (I have played it over 100 hours on this machine, but hadn't in about two months) it would crash on startup everytime.

So, I installed the legacy drivers, per your first link here (THANK YOU VERY MUCH!!!!), but didn't the second because I literally just upgraded a few days ago, so I'm thinking it's not necessary to reinstall the new ones. So I was wondering if you sure this additional step was necessary.

I suppose I could just do it and see if anything is messed up, but I get so worried about things like this that I usually try and be more safe than sorry, so if anyone knows FOR SURE whether this additional step (reinstalling the new Physx drivers) is necessary.

Thanks again for solving my problem though. MANY MANY THANKS. I couldn't figure out what the heck was going on because I've played that game so many times and so many hours and had zero problems. Then suddenly it wouldn't run AT ALL. But I come here, and within minutes find a solution. You guys here at GOG are just AWESOME!!!

Thank you again.
Post edited February 14, 2013 by OldFatGuy
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OldFatGuy: Are you sure this step is necessary??

I just recently upgraded my Nvidia driver ... but didn't the second because I literally just upgraded a few days ago, so I'm thinking it's not necessary to reinstall the new ones. So I was wondering if you sure this additional step was necessary.
Nvidia's video card driver package includes the latest version of PhysX at the time; the manual installer is still necessary for those using AMD/Intel cards, or Nvidia cards with outdated/end-of-line drivers.

Either way, running the normal PhysX installer doesn't hurt; if the latest version is present the installer will tell you (and doesn't change anything), and if it isn't you've eliminated the potential for similarly uninformative crashes in other PhysX games if the minimum version they require hasn't been installed for whatever reason. Of course you can also check the PhysX version in the Control Panel and so forth to see if the one at the Nvidia PhysX System Software link is newer than what you have (that link always points to the latest normal PhysX installer).

Hopefully GOG will update the installer with the new legacy installer, if that's possible.
Post edited February 14, 2013 by Arkose
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Arkose: Of course you can also check the PhysX version in the Control Panel and so forth to see if the one at the Nvidia PhysX System Software link is newer than what you have (that link always points to the latest normal PhysX installer).
Ok, I just checked. And the version on my system is 09.12.1031 and it looks like that indeed is the latest version.

So, just to clarify, if folks out there have Nvidia cards, and have updated to the 12/29/2012 driver (310.90) and discover Two Worlds won't run, all you need to do is install the legacy drivers (link above) and you're good to go.

THANKS AGAIN FOR ALL OF YOUR HELP!!!
Yep! Works! Thank you for posting the link to the Physx driver Arkose. It helped for a couple other games I have too.

Cheers!
Post edited March 03, 2013 by book99
Two Worlds crashes before starting not *yet* solved as suggested under "two_worlds_series/game_crashes_on_startup_every_time."

I was having the same problem, tried to download the older PhyX Legacy drivers and they wouldn't install because nVidia says I already have the latest. I suppose I could uninstall PhysX Legacy, install the older Legacy drivers and the new one on top, but someone commented that the new drivers already contains the old. Hm...I'm stumped. And unable to load the game.