How to get a CD Key for free
1 - First step is to register as the member
2 - Go to the "Earn Coins" page
3 - Choose an offer and complete it with valid information
4 - After completion your coins will be automatically awarded to your account and you can get the Patterna CD Key
About This Game
Patterna is a logic puzzle game for people who think that HexCells is far too easy. It features a highly customizable random level generator, a level editor, more than 70 levels, and an enchanting minimalist soundtrack by Alex Cottrell.

In Patterna, each level is a network of nodes (also known as a graph). In a way similar to HexCells or Minesweeper, each node is ultimately in one of two states (known as pattern and non-pattern). Initially, most nodes states are unknown. It is the players task to correctly classify these unrevealed nodes using information based on distance, connectivity, and color. Correctly classifying a node may reveal more information that in turn helps you to solve the level.

- More than 70 levels, plus a tutorial
- Procedurally generated levels with plenty of options for the level generator
- Enchanting minimalist original soundtrack by Alex Cottrell
- Absolutely no guessing needed
Source:
Patterna - SteamPowered.com
Instructions to activate steam keys
1 - Download and install the Steam client on your PC.
2 - Open the Steam client, login and locate the Games tab on the top menu. Click this and then select “Activate a Product on Steam…”
3 - Enter your product key that appears on the email and follow the instructions to activate it.
4 - Your game is now viewable in the “Library” tab and is available to download/install when you’re ready