You can figure out how to use these keys...

I, Gladiator I8RLJ4-PMXLE-GL3H4I
I, Gladiator I0ETVQ-ZPN7A-M4YH7I
I Have No Mouth, and I Must Scream I6C3Y2-QEIN6-TLZH9I
I Have No Mouth, and I Must Scream IHTWIP-K5G82-8CIIDI
The I of the Dragon IAPYIY-XWWB0-WPYL3I
IACTURA I4T9KE-98KBK-ZMGYEI
Iesabel IEVQZJ-T045P-7WX3YI
Immersion I88ECZ-6FX2J-F2HH5I
Imperial Glory IG2ZWD-FVKRA-RNWW0I
Impire I6C54A-YAVYV-EATTEI
Impire IAWCR5-D0MVQ-29BNQI
The Impossible Game I4CQ0X-C4ICT-FKCL9I
Impulse! IEGCL4-9JWLD-EVTJXI
Impulse! IDNHPZ-GFIPY-AQWKJI
Impulse! IDFVPL-H2Y0G-C3C5YI
In Between - Deluxe I5Z9RG-PYX9Z-BB596I
In Between - Deluxe I24294-68GZM-5PKAQI
In Between - Deluxe I23GGY-YJ2LB-6JC66I
Into the Void IBGE46-GMCET-F6JQQI
Indie Fight I06ZV6-GGDRH-D8I8PI
Indie Game Battle IE24QJ-BR6FY-3VEJ5I
Indie Game Battle IE0RCA-CP262-96Y3AI
Industry Giant 2 I6PQ9P-83365-L8F4EI
Interfectorem I3XNBT-54QPF-Y3AM5I
Initia: Elemental Arena I9ZD9V-XWPGD-NA8ERI
InnerCube I9LRZ4-XQQM7-QH7J5I
Insane I0CRR4-9DKQL-NLF05I
Insane I0DYCY-VHNYX-FYJAPI
Insane 2 I76B7K-AMQ5V-AWCZ7I
inSynch I2D9WX-N9KTF-6XY4WI
Intensive Exposure IAN9RZ-C4LG0-NZAT8I
Invasion I6IYBG-XTMA3-HWK7FI
Invisible Apartment Zero I7IZ3X-B38Y9-T6ZZBI
Invisible Mind I3M755-AWRN9-XAZ9ZI
Iron Grip: Warlord and Scorched Earth DLC IGLW3K-4BRT9-BJ0HYI
Iron Commando - Koutetsu no Senshi I24ZWE-B0IJW-LKKI8I
It Comes Around - A Kinetic Novel I8D64Z-RD7X2-T892KI
It's Spring Again IEZG6I-MP2B0-FWDHLI
It's Spring Again Collector's Edition Content IMRJDN-FFVLV-XZHBWI
It's Spring Again Collector's Edition Content IEV7IE-A9HPY-CVJGWI