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Sonic the Hedgehog is an educational video game developed by Realtime Associates and published by LeapFrog Enterprises. It was released in North America on July 7, 2008 as a launch title for the LeapFrog Didj learning system.[1]

Plot[]

Dr. Eggman has once again stolen the Chaos Emeralds, and it is up to Sonic the Hedgehog to get them back.[2]

Gameplay[]

STH Didj Title Screen

The title screen of Sonic the Hedgehog.

Sonic the Hedgehog is a 2D side-scroller platforming video game, which plays similar to past 2D Sonic games. The player takes control of Sonic the Hedgehog, who can run and jump as his most basic abilities. The game is divided into four Zones, each with two Acts, with a boss fight at the end of the second one.

As with past Sonic games, Rings are scattered across the Acts. Rings work as the player's method of protection; if the player is hit while having at least one Ring, they will survive at the cost of losing all Rings, though they will be given a short amount of time to collect them. However, if the playable character gets hurt without having any Rings on them, they will lose a life, or get a Game Over if they run out of lives.

Controls[]

Button formation[3] Movement
Controlpadds left/right Walk/Run
Controlpadds up Look up
Controlpadds down Look down/Duck
A Jump
Controlpadds left/right + Controlpadds down Roll
Controlpadds down + A Spin Dash
Hint Play a Curricular Gadget tutorial
Pause Pause the game

Objects[]

Items[]

Gimmicks and obstacles[]

Characters[]

Playable characters[]

Non-playable characters[]

Enemies[]

Bosses[]

  1. Drill Eggman (Emerald Hill Zone)
  2. Graviton Mobile (Hydrocity Zone)
  3. Water Eggman (Chemical Plant Zone)
  4. Eggman Mech (Egg Base Zone)

Levels[]

  1. Green Hill Zone
  2. Emerald Hill Zone
  3. Sandopolis Zone
  4. Hydrocity Zone
  5. Scrap Brain Zone
  6. Chemical Plant Zone
  7. Egg Base Zone

Curricular Gadgets[]

Main article: Curricular Gadget

Curricular Gadgets are minigames that are activated by running through Teleport Rings, with a different amount in each level. All of them involve collecting all the right letters to spell or complete a word.

Badges and Bitz[]

During the game, the player will be able to earn various achievements called Badges, which are part of the Didj reward system. each Badge will award the player with a certain number of points called Bitz, depending on the value of the achievement.

Badges are displayed on the player’s Achievement Screen from the game's menu and are stored (alongside the Bitz) on the LeapFrog website.

Bitz are used as currency on the LeapFrog website and can be spent in order to download additional content for this game, as well as other titles on the Didj.

List of Badges[]

Badge Achievement Event Bitz Earned
Complete Zone 1, Act 1 in less than 3 minutes 5
Complete Zone 1, Act 2 in less than 3 minutes 5
Complete Zone 2, Act 1 in less than 3 minutes 5
Complete Zone 2, Act 2 in less than 3 minutes 5
Complete Zone 3, Act 1 in less than 3 minutes 5
Complete Zone 3, Act 2 in less than 3 minutes 5
Complete Zone 1, Act 1 in less than 2 minutes 10
Complete Zone 1, Act 2 in less than 2 minutes 10
Complete Zone 2, Act 1 in less than 2 minutes 10
Complete Zone 2, Act 2 in less than 2 minutes 10
Complete Zone 3, Act 1 in less than 2 minutes 10
Complete Zone 3, Act 2 in less than 2 minutes 10
Collect 100 Rings in Zone 1, Act 1 5
Collect 100 Rings in Zone 1, Act 2 5
Collect 100 Rings in Zone 2, Act 1 5
Collect 100 Rings in Zone 2, Act 2 5
Collect 100 Rings in Zone 3, Act 1 5
Collect 100 Rings in Zone 3, Act 2 5
Collect 200 Rings in Zone 1, Act 1 10
Collect 200 Rings in Zone 1, Act 2 10
Collect 200 Rings in Zone 2, Act 1 10
Collect 200 Rings in Zone 2, Act 2 10
Collect 200 Rings in Zone 3, Act 1 10
Collect 200 Rings in Zone 3, Act 2 10
Collect the Green Emerald 20
Collect the Yellow Emerald 20
Collect the Purple Emerald 20
Collect the Master Emerald 20
Get 5 Gadget Questions correct in a row 20
Get 10 Gadget Questions correct in a row 20
Find all Gadgets in Zone 1, Act 1 25
Find all Gadgets in Zone 1, Act 2 25
Find all Gadgets in Zone 2, Act 1 25
Find all Gadgets in Zone 2, Act 2 25
Find all Gadgets in Zone 3, Act 1 25
Find all Gadgets in Zone 3, Act 2 25
Find every Gadget in the game 50

List of Prizes[]

Because the Didj website has shut down, the full list of prizes is not confirmed, but according to the game's files the following prizes were planned:

Music[]

  • Green Hill (Remix)
  • Hydrocity Zone (Remix)
  • Scrap Brain (Remix)

Animal friends[]

Idle animations[]

  • News pose (reading a newspaper)
  • In-the-shade pose (underneath an umbrella)
  • Yo-yo Pose (playing with a yo-yo)

Victory animations[]

  • Backflipping
  • Breakdancing
  • Moonwalking

Trivia[]

  • The game's logo is derived from the logo of Sonic the Hedgehog (2006).
  • This marks the second Sonic game on a LeapFrog learning system, the first being Sonic X. Sonic X focuses on mathematics, while Sonic the Hedgehog focuses on spelling.
  • The game uses the sprites of Sonic from Sonic 3 & Knuckles, although his color palette is from Sonic Spinball.
  • Despite its name, Green Hill Zone uses sprites from Emerald Hill Zone.
  • All the music from this game are remixes of music from Sonic 3 & Knuckles:[8]
    • The title music, as well as the theme for both Green Hill Zone and Emerald Hill Zone, is the theme for Mushroom Hill Zone Act 1 from Sonic & Knuckles.
      • A sped-up version is used when Sonic collects the Power Sneakers in any stage.
      • Another remix was also available for download.
      • The real title music is in the game's files and is the same title music from Sonic & Knuckles.
    • The theme for the main menu and the credits is the same music used for the ending theme of Sonic 3D Blast on the Sega Genesis.
    • The theme for Hydrocity Zone is the theme for Sandopolis Zone, Act 1 from Sonic & Knuckles.
      • Another remix was also available for download.
    • The theme for Scrap Brain Zone is the theme for Flying Battery Zone, Act 1 from Sonic & Knuckles.
      • Another remix was also available for download.
    • The invincibility theme is the same invincibility theme from Sonic & Knuckles.
    • The music for clearing a level is the same act clear music from Sonic the Hedgehog 3.
    • The Slot Machine music from Sonic & Knuckles can be heard during the Word Wheel minigame.
    • The Blue Sphere theme from Sonic the Hedgehog 3 can be heard during the cannon minigame.
    • The Act 1 mini-boss theme from Sonic & Knuckles can be heard in Egg Base Zone, as well as during a boss.
    • The Game Over theme from Sonic the Hedgehog 3 can be heard when the player loses all their lives.
    • A remix of the 1-up jingle from Sonic & Knuckles was in the game's files but was unused.
  • The title screen itself uses Sonic's sprite from the title screen of the original Sonic the Hedgehog, but the title screen in the Didj's main menu uses Sonic's sprite from the ending of said game.

Video[]

Sonic_The_Hedgehog_Didj_Commercial

Sonic The Hedgehog Didj Commercial

Trailer


See also[]

References[]

  1. 1.0 1.1 LEAPFROG LETS THE GAMES BEGIN: NEW WEB-CONNECTED GAMING HANDHELDS AVAILABLE NOW. Leapfrog Enterprises (July 7, 2008). Archived from the original on December 4, 2008. Retrieved on November 10, 2022. "Didj titles now available include SEGA's Sonic the Hedgehog, Nickelodeon's SpongeBob SquarePants: Fists of Foam, and Nicktoons: Android Invasion."
  2. 2.0 2.1 Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 5.
  3. Sonic the Hedgehog (LeapFrog Didj) game design document, pgs. 23-24.
  4. 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 10.
  5. 5.0 5.1 5.2 5.3 Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 9.
  6. 6.0 6.1 6.2 6.3 6.4 6.5 Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 6.
  7. 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 7.
  8. Sonic the Hedgehog (LeapFrog Didj) game design document, pg. 18.
Sonic the Hedgehog handheld games

Sonic the Hedgehog spin-off games
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