Is there any way to prevent people from making my web game available offline?

Question

It's not the type of game that really need a server to operate. I'm using javascript and html5 right now, and I cant think of a way to prevent the game from being rip off.

Using obsfucator is useless, the game would still work offline.

Implementing a validation scheme is not invincible either. Someone smart can just crack the script and remove the validation part.

Answer 1

You're right in that a clientside-only can't be prevented from running offline. How about moving part of the game logic to the server?

Answer 2

Make it attractive for users to play on your site.

For example:

• Provide online Highscores.
• Introduce a multiplayer option
• Create friends list
• Provide a server based achievement system
• Develop other games and provide them on the same page so users want to come back
• Create "level packs" and similar add on content and release them on your page

Overall, there are other possibilities to get users to play on your site besides technical restrictions, which - as you already found out - are difficult to deploy in an open source, browser driven environment. But, on the web, this has always been a feature, not a bug.