- 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 Ball (Switch eShop)
- I Am Dead (Switch 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 dream of you and ice cream (Switch eShop)
- I Hate Running Backwards (Switch eShop)
- I Heart Geeks (DS)
- I Love Dolphin (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 Spy: Fun House (DS)
- 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-Ninja (GCN)
- I.F.O (New 3DS)
- ibb & obb (Switch eShop)
- iCarly (DS)
- Ice Age 2: The Meltdown (DS)
- Ice Age 2: The Meltdown (GCN)
- Ice Age Scrat's Nutty Adventure! (Switch)
- Ice Age: Continental Drift - Arctic Games (DS)
- Ice Age: Dawn of the Dinosaurs (DS)
- Ice Age: Scrat's Nutty Adventure (Switch)
- 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)
- Idaten Jump DS: Moero! Flame Kaiser (DS)
- Idle Champions of the Forgotten Realms (Switch eShop)
- If My Heart Had Wings (Switch eShop)
- Igor (DS)
- 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)
- IL-2 Sturmovik: Birds of Prey (DS)
- illo: birth of the cool (3DS eShop)
- illo: birth of the cool (Wii U eShop)
- Illusion of Gaia (SNES)
- Illusion of L'Phalcia (Switch eShop)
- Illust Logic DS + Colorful Logic (DS)
- ImageFight (Wii U eShop)
- ImageFight II (Wii U eShop)
- Imagine Fashion Designer (3DS)
- Imagine fashion designer (DS)
- Imagine Me (Wii U eShop)
- Imagine: Animal Doctor (DS)
- Imagine: Artist (DS)
- Imagine: Babies (DS)
- Imagine: Baby Club (DS)
- Imagine: Ballet Star (DS)
- Imagine: Boutique Owner (DS)
- Imagine: Champion Rider (DS)
- Imagine: Champion Rider 3D (3DS)
- Imagine: Cheerleader (DS)
- Imagine: Detective (DS)
- Imagine: Family Doctor (DS)
- Imagine: Fashion Designer New York (DS)
- Imagine: Fashion Designer World Tour (DS)
- Imagine: Figure Skater (DS)
- Imagine: Gymnast (DS)
- Imagine: Ice Champions (DS)
- Imagine: Interior Designer (DS)
- Imagine: Makeup Artist (DS)
- Imagine: Master Chef (DS)
- Imagine: Modern Dancer (DS)
- Imagine: Movie Star (DS)
- Imagine: Music Fest (DS)
- Imagine: Rock Star (DS)
- Imagine: Salon Stylist (DS)
- Imagine: Soccer Captain (DS)
- Imagine: Teacher (DS)
- Imagine: Teacher Class Trip (DS)
- Imagine: Wedding Designer (DS)
- Immortal Planet (Switch eShop)
- Immortal Realms: Vampire Wars (Switch eShop)
- Immortal Redneck (Switch eShop)
- Implosion (Switch eShop)
- Impossible Mission (C64)
- Impossible Mission (DS)
- Impossible Mission (Switch eShop)
- Impossible Mission II (C64)
- In Between (Switch eShop)
- In Between (Wii U eShop)
- In Other Waters (Switch eShop)
- In Your Face (GB)
- In-vert (Switch eShop)
- Inazuma Eleven (3DS eShop)
- Inazuma Eleven (DS)
- Inazuma Eleven 2 Blizzard (DS)
- Inazuma Eleven 2 Firestorm (DS)
- Inazuma Eleven 3 (3DS)
- Inazuma Eleven 3 Sekai e no Chousen (DS)
- Inazuma Eleven 3: Team Ogre Attacks (3DS)
- Inazuma Eleven GO Chrono Stones: Wildfire & Thunderflash (3DS)
- Inazuma Eleven GO: Light & Shadow (3DS)
- Inazuma Eleven Strikers (Wii)
- Inazuma Eleven: Heroes’ Great Road (Switch)
- inbento (Switch eShop)
- Inchworm Animation (DSiWare)
- Incoming! (WiiWare)
- Incredible Mandy (Switch eShop)
- Indiana Jones and the Last Crusade (GB)
- Indiana Jones and the Staff of Kings (DS)
- Indiana Jones and the Staff of Kings (Wii)
- Indiana Jones' Greatest Adventures (SNES)
- Indianapolis 500 Legends (DS)
- Indie Darling Bundle Vol 2 (Switch eShop)
- Indie Gems Bundle - Explosions Edition (Switch eShop)
- Indie Gems Bundle - JRPG Edition (Switch eShop)
- Indie Gems Bundle - Nonograms edition (Switch eShop)
- Indie Puzzle Bundle Vol 1 (Switch eShop)
- Indiecalypse (Switch eShop)
- Indivisible (Switch eShop)
- Inertial Drift (Switch)
- Infected Shelter (Switch eShop)
- Infernium (Switch eShop)
- Inferno 2 (Switch eShop)
- Inferno Climber: Reborn (Switch eShop)
- Infini (Switch eShop)
- Infinite - Beyond the Mind (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)
- Infliction (Switch eShop)
- Infliction: Extended Cut (Switch 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)
- Inkheart (DS)
- InkSplosion (Switch eShop)
- Inkub (WiiWare)
- Inkulinati (Switch eShop)
- 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)
- Insecticide (DS)
- Inside (Switch eShop)
- Inside My Radio (Switch eShop)
- Inside My Radio (Wii U eShop)
- Insmouse No Yakata (VB)
- Instant Sports (Switch eShop)
- Instant Tennis (Switch eShop)
- Intellivision Lives! (DS)
- Intellivision Lives! (GCN)
- Interactive Storybook Series 1 (DS)
- Interactive Storybook Series 2 (DS)
- Interactive Storybook Series 3 (DS)
- Internal Invasion (Wii U eShop)
- International Athletics (DS)
- International Karate (C64)
- International Karate + (C64)
- International Superstar Soccer (GB)
- International Superstar Soccer (SNES)
- International Superstar Soccer 2 (GCN)
- International Superstar Soccer 3 (GCN)
- Into The Breach (Switch eShop)
- Into the Dead 2 (Switch)
- InuYasha: Secret of the Divine Jewel (DS)
- INVANOID (Wii U eShop)
- Invasion of Alien X - Earth in Crisis (Switch eShop)
- Invasion of the Alien Blobs! (DSiWare)
- Inventioneers (Switch eShop)
- INVERSUS Deluxe (Switch eShop)
- Invisiballs (Switch eShop)
- Invisible Fist (Switch eShop)
- Invisible, Inc. Nintendo Switch Edition (Switch eShop)
- Invisigun Reloaded (Switch eShop)
- Ion Fury (Switch)
- IQ Test (Wii U eShop)
- Iris School of Wizardry -Vinculum Hearts- (Switch eShop)
- Iro Hero (Switch eShop)
- Iron Chef America: Supreme Cuisine (DS)
- Iron Combat: War in the Air (3DS eShop)
- Iron Crypticle (Switch eShop)
- Iron Feather (DS)
- Iron Man (DS)
- Iron Man (Wii)
- Iron Man 2 (DS)
- Iron Man 2 (Wii)
- Iron Man and X-O Manowar in Heavy Metal (GB)
- Iron Snout (Switch eShop)
- Iron Wings (Switch eShop)
- Ironcast (Switch eShop)
- Ironclad (Neo Geo)
- IRONFALL Invasion (3DS eShop)
- Irony Curtain: From Matryoshka with Love (Switch eShop)
- Irozuki Tincle no Koi no Balloon Trip (DS)
- Is It Wrong To Try To Pick Up Girls In A Dungeon? - Infinite Combate (Switch)
- Ishido: The Way of Stones (GB)
- Island Flight Simulator (Switch)
- Island Flight Simulator (Wii U eShop)
- Island Maze (Switch eShop)
- Island Saver (Switch 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 came from space and ate our brains (Switch eShop)
- It's My Birthday (Wii)
- It's Raining Fists and Metal (Switch eShop)
- It's Spring Again (Switch eShop)
- Itadaki Street DS (DS)
- ITTA (Switch eShop)
- Ittle Dew (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)