Sonic the Hedgehog (2013)

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Sonic the Hedgehog
Developer: Sonic Team, Christian Whitehead Publisher: Sega Platforms: iOS, Android Released internationally: May 16, 2013 This game has unused graphics. This game has debugging material. This game has a hidden sound test. This game has a hidden level select.

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Finally, for once, a version of Sonic 1 that isn't a straight-up emulation, Sonic Jam and the really lackluster GBA version aside. Powered by the fan-made Retro Engine, this version features smoother animation, achievement/leaderboard support, and the ability to choose between three playable characters. But there's more...

To do: Get graphic rips of the Zone 7 icon, prohibitory sign, and the unused monitors.

Level Select

To access the level select, start a "No Save" game and choose a character. On the SEGA logo screen, tap the letters S-E-G-A in that order, once the entire word appears. If done correctly, you will hear the ring chime. Then hold two fingers on the bottom of the screen and wait. After the title screen appears, you'll be taken to a Sonic 2-style Level Select.

(Source: Sonic Retro)

The level select has several options aside from selecting levels and the sound test:

• Player: Allows the player to choose between Sonic, Tails, Knuckles, or Sonic and Tails (like Sonic 2).
• Spindash: On or off, like the Settings menu.
• GND SPD Cap: Ground speed cap on/off. "On" simulates the original game.
• AIR SPD Cap: Air speed cap on/off. "On" simulates the original game.
• S1 Spikes: On/off. Toggles the infamous no-invincibility-frame spikes from the original game.
• Items: S1, S2, S1+3, S2+3. Seems to control what monitors appear. Selecting an option with "+3" gives Sonic the ability to use elemental shields and the insta-shield move from that game.
• Max Emeralds: 6 or 7 Chaos emeralds. Choosing 7 allows Sonic to transform into Sonic 2's Super Sonic once the player gets 50 rings and double-taps the screen!

Debug Mode

In the sound test, play sounds 01, 09, 09, 01, 00, 06, 02, 03 (the US/European release date of the original Genesis game). During gameplay, tap the upper-left corner of the screen to access the debug mode. To change the item you are placing, press the + or - on the top of the screen.

(Source: Sonic Retro)

Unused Sprites

Special Stage

All of these can be seen with Debug Mode.

Artwork	Name	Description
	"Zone" Icons	Present in the original game, these icons would have indicated which Special Stage you were in. Interestingly, a Zone 7 icon was added to this port.
	1-up Icon	Extra life icon for the Special Stages, listed in the original game's instruction manual but never actually appearing in any of them in any iteration of the game. It is still fully functional, and can be placed in any Special Stage. The icon disappears like a ring when touched.
	"W" Icon	A solid block. Its use is unknown and it has no function when placed in-game.
	Prohibitory Sign	A prohibitory sign can be found within the debug mode but can't be placed.