How to avoid claims of copyrights???

[dalerank]

No description provided.

[Bernd Ritter]

Simply don't offer files that you have no copyright on! :-)

[dalerank]

Ok. Question 1. What about caesar 3 free demo version? Can i use resources from it??? Question 2. About point no derivatives work on license. Is mod development derivative work or not??? Question 3. If i no sell mod and no profit by mod is it legal to use user copy of game??? Thanks

[Bernd Ritter]

1. As long as you don't offer the files in any way modified you should be fine. It should be legal to use resources from it. But i would keep the extraction to the user. You could offer an wiki article to help the user perform the necessary steps. We did that with FreeCNC before C&C was freely available.
2. It sure is. But you don't change the original assets don't you? All you do is to offer an engine to an existing game. (we did the same with FreeCNC).
3. The user can use his legally bought copy of Caesar 3 and install it. You engine simply uses thes files. There is nothing illegal on that.

Bonus point: If not already, point out on several occasions that you need to buy the original Caesar 3 game. Offer a GOG-Link or similar. That should keep lawyers aware that you don't want to offer copyrighted material.

[dalerank]

1. that good idea, i try fix it shortly

Bonus point: really good thinks, it is strange that it didn't come to me from start

[Andrei Brănescu]

I agree with Bernd Ritter.