Free keys!

I have some keys i cannot use on the official giveaways because these are games with reduced value. I already have them, i'm not sure if all these keys work, but take them! tell me if you successfully redeem them, i will post them numerically and you tell me the number redeemed successfully, and also, if one of them is duplicated or something, tell it too! Just to know, enjoy!

1. FFBVZ-7L49C-YN62E .................................................. Knights and merchants
2. VIF4P-TY6P7-CEVW8 .................................................. Knightshift
3. YIRAV-EDBIJ-PKL7I ..................................................... Pirates of black cove gold
4. H4VYB-6EV0V-C0RZT ................................................. Earth 2150 lost souls
5. 67XX2-882QF-XE0HB .................................................. Earth 2150 the moon project
6. XKQ6A-A8VZ8-EGCWK ............................................... Knights and merchants
7. 4DGIE-32L2I-7ATGE ..................................................... Knightshift
8. EM0V3-RFEN6-T97XK .................................................. Pirates of black cove gold
9. R5VTE-93NLF-5XNZ8 .................................................. Two worlds epic edition
10. 8Y6G4-8BINF-JLVY3 ................................................... Dirt showdown