I want to play a game.

Since these from the Mystery bundle, it's only fitting to have some puzzles for them.

Each key is has 3 groups and each group has 5 characters.

Solve these to get the keys :)

1) Grim Legends: The Forsaken Bride RJZNL-JR27K-E2GJP The gropus have been reversed.
2) Enigmatis 2: The Mists of Ravenwood GWZT6-EW0IY-PMM53 Caesar jumbled the code by 3
3) 9 Clues: The Secret of Serpent Creek DW0GD-K7J36-J3I5M

Pick a number
Add 9 to it
Multiply by 2
Subtract 4
Divide by 2
Subtract the first number
Multiply by 3
Subtract 21 to find how many time you need to shift this code to the right.

4) Nightmares from the Deep 2: The Siren`s Call 8HYCN-5L422-ML8AE Circular shift left
5) Clockwork Tales: Of Glass and Ink FY6NT-GECHN-E7YLD center-left right-center left-right

I would appreciate it if you reply here once you've claimed a key so I can mark it as used.
Thank you :)