Step 1:
Sign-Up here:
https://www.hrkgame.com/accounts/signup/
Step 2:
Go to http://grabfreegames.com/free-game/213-particula-steam-full
Step 3:
Go to:
https://www.hrkgame.com/library/inventory/?type=4 and click "Redeem now"
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Thursday, October 15, 2015