Promo codes may be won, or may be given to you from a friend or may just happen to appear in some social media.
Some mandatory legal text :
In case you have a promo code and wish to use it -> You agree to the terms & conditions for taking and redeeming promo codes.
Codes expire by 28 days after making them. Check the creation date, which should be supplied where you got it :).
They are redeemable only on the iTunes Stores where the game - Trinagon 3D is available. This requires an iTunes account, subject to prior acceptance
of license and usage terms. To open an account please refer to the local laws & regulations. Compatible
software and hardware, and internet access (fees may apply) required. Not for resale. Full terms apply; see
www.apple.com/legal/itunes/ww/. For more information, see www.apple.com/support/.
This game is provided to you by a guy named lucas pradlwarter aka Lumpazy
Feel free to check out the details applying to your locality here.