blotunga: The games are just a gimmick. You don't need to play them yo get the codes. In the redeem page you can try for example "secret room", or "test" etc.
amrit9037: Well sadly none of them worked for me.
Secret room : Book Of Unwritten Tales: The Critter Chronicles, The
April Fools: Turok
Test , test1, test2 : Stronghold Crusader 2
Skyrim : Unmechanical
Facebook : Freedom Planet
retro , Reddit,removed : The Witcher
weekly sale : Postal 2
cruel : Dreamfall Chapters
warcraft : DROD: The Second Sky
starcraft : Crypt of the NecroDancer
News : Worms World Party Remastered
HEADLINES : Battle Worlds: Kronos
upcoming : Fallout
galaxy : Witcher 2: Assassins Of Kings, The - Enhanced Edition
beta : Book of Unwritten Tales, The
support : Master of Orion 1+2
account : Night of the Rabbit, The
dead : Postal
age : Witcher 3: Wild Hunt, The - Expansion Pass
harry : Dead State: Reanimated
Congrats to lucky one for whom these worked.
It seems some of the redeem codes may be simpler than they appear. Instead of retro, reddit, or removed, just re seems to be enough of a code to put in, and just about any combination of letters after it works. Sk works for Unmechanical, St for Crypt of the Necrodancer, Ha for Dead State: Reanimated, etc.