World

A World is a group of levels in Mario games. In Super Mario Bros. and Super Mario Bros.: The Lost Levels, each world always has exactly four levels, and in Super Mario Bros. 2 each world has three (except the final level, which only has two). However, starting in Super Mario Bros. 3, most games have a varying number of levels. In some three-dimensional Mario games, worlds are no longer used; now each level stands alone (but each level is sometimes referred to as a world), and the missions are either referred to as stars or episodes. In earlier games, worlds were simply numbered "World 1", "World 2", etc. In Super Mario Bros. 3, they have distinct names. Super Mario World has no clear separation of worlds on the world map.

In general terms, a "world" refers to any large area of land and space marked off from other regions. As such, "world" may refer to a politically or geographically distinct region of land (such as Desert Hill or Chocolate Island), a planet, or even an entire galaxy.

Donkey Kong

 * 25m
 * 50m
 * 75m
 * 100m

Super Mario Bros.

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8
 * World -1 (World 36)

Super Mario Bros.: The Lost Levels

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8
 * World 9
 * World A
 * World B
 * World C
 * World D

Super Mario Bros. 2

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7

Super Mario Bros. 3

 * Grass Land
 * Desert Hill
 * Water Land
 * Giant Land
 * Sky Land
 * Ice Land
 * Pipe Land
 * Dark Land
 * Warp Zone
 * World-e (Super Mario Advance 4 only)

Super Mario World

 * Yoshi's Island
 * Donut Plains
 * Vanilla Dome
 * Twin Bridges
 * Forest of Illusion
 * Chocolate Island
 * Valley of Bowser
 * Star World
 * Special World

Super Mario World 2: Yoshi's Island

 * World 0
 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6

Yoshi's Island DS

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5

Super Mario Land

 * Birabuto Kingdom
 * Muda Kingdom
 * Easton Kingdom
 * Chai Kingdom

Super Mario Land 2: 6 Golden Coins

 * Tree Zone
 * Space Zone
 * Macro Zone
 * Pumpkin Zone
 * Mario Zone
 * Turtle Zone
 * Mario's Castle

Wario Land: Super Mario Land 3

 * Rice Beach
 * Mt. Teapot
 * Sherbet Land
 * Stove Canyon
 * SS Tea Cup
 * Parsley Woods
 * Syrup Castle

Wario Land II

 * One Noisy Morning
 * SS Tea Cup
 * Invade Wario Castle
 * Go to the Cellar!!
 * Maze Woods
 * Ruins at the Bottom of the Sea
 * In Town
 * Syrup Castle
 * Mysterious Factory!
 * Uncanny Mansion

New Super Mario Bros.

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8

Super Princess Peach

 * Ladida Plains
 * Hoo's Wood
 * Shriek Mansion
 * Fury Volcano
 * Wavy Beach
 * Gleam Glacier
 * Giddy Sky
 * Bowser's Villa

Mario vs. Donkey Kong

 * Mario Toy Company
 * Donkey Kong Jungle
 * Fire Mountain
 * Spooky House
 * Mystic Forest
 * Twilight City
 * Mario Toy Factory
 * Donkey Kong Jungle Plus
 * Fire Mountain Plus
 * Spooky House Plus
 * Mystic Forest Plus
 * Twilight City Plus

Mario vs. Donkey Kong 2: March of the Minis

 * Basement
 * Mushroom Mayhem
 * Tropical Island
 * Pipe Works
 * Magnet Mania
 * Lava Dome
 * Toadstool Castle
 * Spooky Attic
 * Jungle Hijinks
 * Roof

Super Mario Galaxy

 * Terrace
 * Fountain
 * Kitchen
 * Bedroom
 * Engine Room
 * Garden
 * Center of the Universe
 * Gate
 * The Trial Galaxies

New Super Mario Bros. Wii

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8
 * World 9
 * Coin Battle World (Coin Battle only)

Super Mario Galaxy 2

 * World 1: The Great Space Journey Begins
 * World 2: Shooting Through the Stars
 * World 3: The Far Reaches of the Universe
 * World 4: The Many Mysteries of the Cosmos
 * World 5: Trial of the Galaxies
 * World 6: Bowser in Your Sights
 * World S: Here We Go!

Super Mario 3D Land

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8
 * Special 1
 * Special 2
 * Special 3
 * Special 4
 * Special 5
 * Special 6
 * Special 7
 * Special 8

New Super Mario Bros. 2

 * World 1
 * World 2
 * World Mushroom
 * World 3
 * World 4
 * World Flower
 * World 5
 * World 6
 * World Star

New Super Mario Bros. U & New Super Luigi U

 * Acorn Plains
 * Layer Cake Desert
 * Sparkling Waters
 * Frosted Glacier
 * Soda Jungle
 * Rock-Candy Mines
 * Meringue Clouds
 * Peach's Castle
 * Superstar Road
 * Secret Island
 * Coin Courses (Multiplayer Exclusive)

Super Mario 3D World

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World Castle
 * World Bowser
 * World Star
 * World Mushroom
 * World Flower
 * World Crown

Donkey Kong (Game Boy)

 * Construction Site (25m, 50m, 75m, 100m)
 * Big City
 * Forest
 * Ship
 * Jungle
 * Desert
 * Airplane
 * Iceberg
 * Rocky Valley
 * Tower

Donkey Kong Country

 * Kongo Jungle
 * Monkey Mines
 * Vine Valley
 * Gorilla Glacier
 * Kremkroc Industries, Inc.
 * Chimp Caverns
 * Gangplank Galleon

Donkey Kong Country 2: Diddy's Kong Quest

 * Gangplank Galleon
 * Crocodile Cauldron
 * Krem Quay
 * Krazy Kremland
 * Gloomy Gulch
 * K. Rool's Keep
 * The Flying Krock

Donkey Kong Country 3: Dixie Kong's Double Trouble

 * Lake Orangatanga
 * Kremwood Forest
 * Cotton-Top Cove
 * Mekanos
 * K3
 * Razor Ridge
 * Pacifica (GBA Only)
 * KAOS Kore
 * Krematoa

Donkey Kong Country Returns

 * Jungle
 * Beach
 * Ruins
 * Cave
 * Forest
 * Cliff
 * Factory
 * Volcano
 * Cloud (Nintendo 3DS version only)

Donkey Kong Country: Tropical Freeze

 * Lost Mangroves
 * Autumn Heights
 * Bright Savannah
 * Sea Breeze Cove
 * Juicy Jungle
 * Donkey Kong Island
 * Secret Seclusion

Main game

 * Coaster Hills
 * Jumpy Jungle
 * Teatime Twirl
 * Warped Mansion
 * Sandstorm Steps
 * Cosmic Adventure
 * Cannon Cove
 * Super Skywheel
 * Final Ferris Wheel

Extra

 * Rainbow Summit (Special levels)
 * Secret Storage (Expert levels)