Starting Problem.

I click on the play button and then it loads for 2 seconds then says"this game is currently unavailibale(corrupt game files)".What should i do?

should i re-install the game?

Try verifying your cache as this usually resolves these issues:

1: Open your steam library
2: Right click Dungeon Defenders (http://i.imgur.com/UyPCa.jpg)
3: Click properties (http://i.imgur.com/JvLz2.jpg)
4: Click local files (http://i.imgur.com/TO5wC.png)
5: Click verify integrity of game cache (http://i.imgur.com/IZDGD.png)

If that doesn't help try this:

First close down Steam and then navigate to C:\Program Files (x86)\Steam\steamapps and delete sourceinit.gcf

Ok it worked thank you SO much