I was really bored,so I though why not write some php scripts.I haven't used php in a long time.
This little system is pretty basic,but effective and easy to implement.
What it does is,It requests the user to enter a serial,given to him from the author of the game,to be able to download it.It has an admin panel where you can add games and serials (or delete them).
The serials are 20 symbols.The game is recommended to stay on your server in the files/ folder,because it is protected from direct access.
Your game must be in an archive.
Interface screen :
UPDATE - BETA 2 Released.
Added : Option to buy serials and Option to reactivate serial via e-mail.Uses PayPal for correspondent.
Download link - http://www.mediafire.com/?cuu3ak9wpq8ydj2

Yeah I said it.FIRST PERSON SOCCER!