- I am an Air Traffic Controller Airport Hero Hawaii (3DS eShop)
- I am an Air Traffic Controller Airport Hero Narita (3DS eShop)
- I am an air traffic controller AIRPORT HERO OSAKA-KIX (3DS eShop)
- I Am In The Movie (DSiWare)
- I Am Setsuna (Switch eShop)
- I Am The Hero (Switch eShop)
- I and Me (Switch eShop)
- I C REDD (Wii U eShop)
- I Hate Running Backwards (Switch eShop)
- I Heart Geeks (DS)
- I Love my Cats (3DS eShop)
- I Love My Dogs (3DS eShop)
- I Love My Horse (3DS)
- I Love My Little Boy (3DS)
- I Love My Little Girl (3DS)
- I Love My Pets (3DS)
- I Love My Pony (3DS)
- I Must Run! (DSiWare)
- I SPY Spooky Mansion (Wii)
- I wanna fly (Switch eShop)
- I've Got to Run! (Wii U eShop)
- I've Got to Run: Complete Edition! (3DS eShop)
- I, Zombie (Switch eShop)
- I.F.O (New 3DS)
- Ice Climber (NES)
- Ice Cream Surfer (Switch eShop)
- Ice Cream Surfer (Wii U eShop)
- Ice Hockey (NES)
- Ice Hockey Slovakia 2011 (DSiWare)
- Ice Station Z (3DS eShop)
- ICEY (Switch eShop)
- Iconoclasts (Switch eShop)
- Igor The Game (Wii)
- IHUGU (Switch eShop)
- Ikachan (3DS eShop)
- Ikaruga (GCN)
- Ikaruga (Switch eShop)
- Ike Ike! Nekketsu Hockey Bu: Subette Koronde Dairantō (NES)
- Ikibago (DSiWare)
- illo: birth of the cool (3DS eShop)
- illo: birth of the cool (Wii U eShop)
- Illusion of Gaia (SNES)
- ImageFight (Wii U eShop)
- ImageFight II (Wii U eShop)
- Imagine Fashion Designer (3DS)
- Imagine Me (Wii U eShop)
- Imagine: Champion Rider 3D (3DS)
- Immortal Realms: Vampire Wars (Switch eShop)
- Immortal Redneck (Switch eShop)
- Implosion (Switch eShop)
- Impossible Mission (C64)
- Impossible Mission (Switch eShop)
- Impossible Mission II (C64)
- In Between (Switch eShop)
- In Between (Wii U eShop)
- In Your Face (GB)
- Inazuma Eleven (3DS eShop)
- Inazuma Eleven (DS)
- Inazuma Eleven 2 Blizzard (DS)
- Inazuma Eleven 2 Firestorm (DS)
- Inazuma Eleven 3 (3DS)
- Inazuma Eleven 3: Team Ogre Attacks (3DS)
- Inazuma Eleven Ares (Switch)
- Inazuma Eleven GO Chrono Stones: Wildfire & Thunderflash (3DS)
- Inazuma Eleven GO: Light & Shadow (3DS)
- Inazuma Eleven Strikers (Wii)
- Inchworm Animation (DSiWare)
- Incoming! (WiiWare)
- Incredible Mandy (Switch eShop)
- Indiana Jones and the Last Crusade (GB)
- Indiana Jones and the Staff of Kings (Wii)
- Indiana Jones' Greatest Adventures (SNES)
- Indivisible (Switch)
- Infected Shelter (Switch eShop)
- Infernium (Switch eShop)
- Inferno Climber: Reborn (Switch eShop)
- Infinite Dunamis (3DS eShop)
- Infinite Frontier Super Robot Wars OG Saga (DS)
- Infinite Golf (New 3DS)
- Infinite Minigolf (Switch eShop)
- Infinite Space (DS)
- Infinity Runner (Wii U eShop)
- InfoGenius Productivity Pak: Berlitz French Translator (GB)
- InfoGenius Productivity Pak: Berlitz Spanish Translator (GB)
- InfoGenius Productivity Pak: Frommer's Travel Guide (GB)
- InfoGenius Productivity Pak: Personal Organizer and Phone Book (GB)
- InfoGenius Productivity Pak: Spell Checker and Calculator (GB)
- Initial D: Perfect Shift Online (3DS eShop)
- Injustice: Gods Among Us (Wii U)
- INK (Switch eShop)
- InkSplosion (Switch eShop)
- Inkub (WiiWare)
- InkyPen (Switch eShop)
- Inmost (Switch eShop)
- InnerSpace (Switch eShop)
- Inops (Switch eShop)
- Insanity's Blade (Wii U eShop)
- Insect Planet TD (3DS eShop)
- Insect Planet TD (Wii U eShop)
- Inside (Switch eShop)
- Inside My Radio (Switch eShop)
- Inside My Radio (Wii U eShop)
- Insmouse No Yakata (VB)
- Instant Tennis (Switch eShop)
- Intellivision Lives! (DS)
- Intellivision Lives! (GCN)
- Internal Invasion (Wii U eShop)
- International Karate (C64)
- International Karate + (C64)
- International Superstar Soccer (GB)
- International Superstar Soccer (SNES)
- International Superstar Soccer 2 (GCN)
- Into The Breach (Switch eShop)
- INVANOID (Wii U eShop)
- Invasion of the Alien Blobs! (DSiWare)
- Inventioneers (Switch eShop)
- INVERSUS Deluxe (Switch eShop)
- Invisiballs (Switch eShop)
- IQ Test (Wii U eShop)
- Iris School of Wizardry -Vinculum Hearts- (Switch eShop)
- Iro Hero (Switch eShop)
- Iron Combat: War in the Air (3DS eShop)
- Iron Crypticle (Switch eShop)
- Iron Man (Wii)
- Iron Man 2 (Wii)
- Iron Man and X-O Manowar in Heavy Metal (GB)
- Iron Snout (Switch eShop)
- Ironcast (Switch eShop)
- Ironclad (Neo Geo)
- IRONFALL Invasion (3DS eShop)
- Irony Curtain: From Matryoshka with Love (Switch eShop)
- Ishido: The Way of Stones (GB)
- Island Flight Simulator (Switch)
- Island Flight Simulator (Wii U eShop)
- Isoland (Switch eShop)
- Isoland 2 - Ashes of Time (Switch eShop)
- iSpot Japan (DSiWare)
- ISS 64 (N64)
- ISS 98 (N64)
- Istanbul: Digital Edition (Switch eShop)
- It's My Birthday (Wii)
- It's Spring Again (Switch eShop)
- Ittle Dew (Wii U eShop)
- Ittle Dew 2+ (Switch)
- Ivanych vs Eared Beast (Switch eShop)
- Ivy the Kiwi? (DS)
- Ivy the Kiwi? (Wii)
- Ivy the Kiwi? Mini (DSiWare)
- izneo (Switch eShop)
- Izuna 2: The Unemployed Ninja Returns (DS)
- Izuna: Legend of the Unemployed Ninja (DS)