- Invisible Maze - find the way to exit!
- IOIO
- IPPON
- IPST Bio
- IQ - Brain Training
- IQ Blocks logic puzzle
- IQ Boost: Training Brain Games
- IQ Brain Fitness Maker
- IQ Candy
- IQ Check
- IQ Dungeon
- IQ Game-Move Diamond
- IQ Glassy
- IQ KING - IQ GAME
- IQ Numbers Game
- IQ PlusMinus
- IQ Puzzle Kingdom
- IQ Puzzle SwimmingPool
- IQ Pyramid - Brain Puzzle Game
- IQ Shapes
- IQ Puzzle - Dot Matrixes
- IQ Test - Find Your Brain Age
- IQ Test - How smart are you?
- IQ Test - Intelligence Test
- IQ Test - What's my IQ?
- IQ Test Chinese Mandarin
- New IQ Test for Kids
- IQ Test Pro Edition
- IQ Test: Brain and Mind Tests
- IQ Test: Intelligence Test
- IQ Words - InterestingQuestion
- IQ1 - Brain Training, Brain Games, Memory Games
- IQ2 - Brain Training, Brain Games, Memory Games
- IQ3 - Brain Training, Brain Games, Memory Games
- IQ4 - Brain Training, Brain Games, Memory Games
- IQTest - Training Brain
- Mr.IQ - 33 IQ questions
- IQ测试 - 智力IQ
- IQ題
- Iris.Fall
- Iris: A Color Matching Game
- IRoHa de Sudoku!
- Iron Ball Number Brick Breaker
- Irony Curtain
- Irrationals
- Irritation Stickman
- Iselin Saga
- Ishido
- Sudoku Wiz: Eastern Enigmas
- Isla Tortuga
- Islamic Puzzle Hadith
- Islamic Quiz - Game
- Island Crossword Puzzle Fun
- Island Hopping Puzzles
- Island Puzzle: Designing games
- Island Hoppers: Explore Farm
- Mystery Island: Hidden Objects
- Islands and Ships logic puzzle
- Cruise: Find The Differences
- Islands in the Stream
- Isogram
- Isoland
- Isoland 2: Ashes of Time
- ISOLAND 3 Dust of the Universe
- ISOLAND: The Amusement Park
- Isotropy
- Ispeci pa reci
- It is difficult to find mines
- It's A Man's Man's Game
- It's Centred That
- It's Full of Sparks
- It's late - Tricky Game
- It's Raining Food
- Italian Alphabet for Toddlers
- Italian Draughts
- Italy Map Puzzle
- ITALY. Land of Wonders
- ItaPittan