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Comparison of Sonic the Hedgehog 2 (16-bit) prereleases

From Sonic Retro

This is a quick comparison of Sonic the Hedgehog 2 for the Sega Mega Drive against several of its known prototypes which were distributed to the gaming press across 1992. It is speculated that there were four different builds demonstrated publically in some form, however at present, only two have been preserved on the internet. This comparison works on the assumption that a further two are yet to be found, however it is fully possible there are more and so should the table below should not be taken as definitive.

In the interests of simplicity, this comparison omits the leaked internal prototypes; "Beta 4", "Beta 5", "Beta 6", "Beta 7" and "Beta 8". With only days (and sometimes only hours) separating each dump, the changes are far less significant, and the core feature set is largely identical to the final game (save for bug-fixes and minor missing features). For a comparison of these later prototypes, see Comparison of Sonic the Hedgehog 2 (16-bit) prereleases (beta 4-beta 8).

This comparison also does not include the 2013 version of the game or similar re-releases created many years after Sonic 2's original release.

General

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Title Screen S2b title.png S2b title.png S2b title.png S2b4 titlescreen.png Sonic2 title.png
Level Select Ss.nas2bls.png Ss.s2bls.png ?? ?? S2 level select.png
Player Animations Betaspin.gif
"Prototype"
Betaspin.gif
"Prototype"
Finalspin.gif
"Final"
Finalspin.gif
"Final"
Finalspin.gif
"Final"
Tails 2P Life Icon Timeline.icon.1.png Timeline.icon.1.png Timeline.icon.1.png Timeline.icon.2.png Timeline.icon.3.png
Tails AI Dumb Dumb Dumb? Smart Smart

Emerald Hill Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order 1 4 ?? ?? 1
Level Select Name STAR LIGHT ZONE GREEN HILL ZONE ?? ?? EMERALD HILL ZONE
Layout, Act 1 Ehz1 mapd small.png Sonic2SW MD Map EHZ1.png ?? ?? S2 map EHZ1.png
Layout, Act 2 Ehz2 mapd small.png Sonic2SW MD Map EHZ2.png ?? ?? S2 map EHZ2.png
Enemies Bee sprite.png Masher sprite.png Snailbot.png Bee sprite.png Masher sprite.png Snailbot.png ?? ?? Buzzer sprite.png Masher sprite.png Coconuts sprite.png

Chemical Plant Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order Level Select Only 2 ?? ?? 2
Level Select Name MARBLE ZONE CHEMICAL PLANT ZONE ?? ?? CHEMICAL PLANT ZONE
Layout, Act 1 Cpz1 mapd small.png xx ?? ?? S2 map CPZ1.png
Layout, Act 2 xx xx ?? ?? S2 map CPZ2.png
Enemies None None ?? ?? Spiny sprite.png Grabber sprite.png
Background Vertical Bars S2 CPZ VerticalBars NA.png S2 CPZ VerticalBars SW.png S2 CPZ VerticalBars SW.png S2 CPZ VerticalBars SW.png S2 CPZ VerticalBars Final.png

Aquatic Ruin Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A 1 ?? ?? 3
Level Select Name N/A NEO GREEN HILL ZONE ?? ?? AQUATIC RUIN ZONE
Layout, Act 1 N/A xx ?? ?? S2 map ARZ1.png
Layout, Act 2 N/A xx ?? ?? S2 map ARZ2.png
Enemies N/A None ?? Grounder sprite.png Chopchop sprite.png Grounder sprite.png Chopchop sprite.png Whisp sprite.png

Casino Night Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? 4
Level Select Name N/A CASINO NIGHT ZONE ?? ?? CASINO NIGHT ZONE
Layout, Act 1 N/A CNZ1Wai.png ?? ?? S2 map CNZ1.png
Layout, Act 2 N/A CNZ2Wai.png ?? ?? S2 map CNZ2.png
Enemies N/A None ?? ?? Crawl sprite.png

Hill Top Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order Level Select Only 3 ?? ?? 5
Level Select Name SCRAP BRAIN ZONE HILL TOP ZONE ?? ?? HILL TOP ZONE
Layout, Act 1 Htz1 mapd small.png xx ?? ?? S2 map HTZ1.png
Layout, Act 2 Htz2 mapd small.png xx ?? ?? S2 map HTZ2.png
Enemies None None ?? Rexon sprite.png Spiker sprite.png Rexon sprite.png Spiker sprite.png Sol sprite.png

Mystic Cave Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? 6
Level Select Name N/A DUST HILL ZONE ?? ?? MYSTIC CAVE ZONE
Layout, Act 1 N/A xx ?? ?? S2 map MCZ1.png
Layout, Act 2 N/A xx ?? ?? S2 map MCZ2.png
Enemies N/A None ?? Crawlton sprite.png Crawlton sprite.png Flasher sprite.png

Oil Ocean Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? 7
Level Select Name N/A OIL OCEAN ZONE ?? ?? OIL OCEAN ZONE
Layout, Act 1 N/A xx ?? ?? S2 map OOZ1.png
Layout, Act 2 N/A xx ?? ?? S2 map OOZ2.png
Enemies N/A None ?? ?? Octus sprite.png Aquis sprite.png
Background Horizonal Tube N/A S2 OOZ BG SW.png S2 OOZ BG SW.png ?? S2 OOZ BG Final.png

Metropolis Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? 8
Level Select Name N/A METROPOLIS ZONE ?? ?? METROPOLIS ZONE
Layout, Act 1 N/A MTZ1Wai.png ?? ?? S2 map MPZ1.png
Layout, Act 2 N/A MTZ2Wai.png ?? ?? S2 map MPZ2.png
Layout, Act 3 N/A MTZ3Wai.png ?? ?? S2 map MPZ3.png
Enemies N/A None ?? ?? Asteron sprite.png Shellcracker sprite.png Slicer sprite.png
Background N/A S2 MZ BG SW.png S2 MZ BG SW.png ?? S2 MZ BG Final.png

Sky Chase Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A N/A ?? ?? 9
Level Select Name N/A N/A ?? ?? SKY CHASE ZONE
Layout, Act 1 N/A xx ?? ?? S2 map SCZ1.png
Enemies N/A None ?? ?? Balkiry sprite.png Nebula sprite.png Turtloid sprite.png

Wing Fortress Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A N/A ?? ?? 10
Level Select Name N/A N/A ?? ?? WING FORTRESS ZONE
Layout, Act 1 N/A xx ?? ?? S2 map WFZ1.png
Enemies N/A None ?? ?? Clucker sprite.png

Death Egg Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? 11
Level Select Name N/A DEATH EGG ZONE ?? ?? DEATH EGG ZONE
Layout, Act 1 N/A xx ?? ?? S2 map DEZ1.png
Layout, Act 2 N/A xx ?? ?? N/A
Enemies N/A None ?? ?? xx

Hidden Palace Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order Level Select Only Level Select Only ?? ?? Hacking Only
Level Select Name SPRING YARD ZONE HIDDEN PALACE ZONE ?? ?? N/A
Layout, Act 1 S2 map HPZ proto.png S2 map HPZ proto.png ?? ?? xx
Layout, Act 2 xx xx ?? ?? xx
Enemies Redz sprite.png BBat sprite.png Redz sprite.png BBat sprite.png ?? ?? None

Wood Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? Hacking Only
Level Select Name N/A WOOD ZONE ?? ?? N/A
Layout, Act 1 N/A WZ1Wai.png ?? ?? xx
Layout, Act 2 N/A xx ?? ?? xx
Enemies N/A None ?? ?? None

Genocide City Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order N/A Level Select Only ?? ?? N/A
Level Select Name N/A GENOCIDE CITY ZONE ?? ?? N/A
Layout, Act 1 N/A xx ?? ?? N/A
Layout, Act 2 N/A xx ?? ?? N/A
Enemies N/A None ?? ?? N/A

Green Hill Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order Level Select Only N/A N/A N/A N/A
Level Select Name GREEN HILL ZONE N/A N/A N/A N/A
Layout, Act 1 xx N/A N/A N/A N/A
Layout, Act 2 xx N/A N/A N/A N/A
Layout, Act 3 xx N/A N/A N/A N/A
Enemies Buzzbomber-spr.png Chopper-spr.png Motobug-spr.png N/A N/A N/A N/A

Labyrinth Zone

"Nick Arcade"
prototype
"Simon Wai"
prototype
Undumped
prototype #1
Undumped
prototype #2
Final Game
Play Order Level Select Only N/A N/A N/A N/A
Level Select Name LABYRINTH ZONE N/A N/A N/A N/A
Layout, Act 1 xx N/A N/A N/A N/A
Layout, Act 2 xx N/A N/A N/A N/A
Layout, Act 3 xx N/A N/A N/A N/A
Enemies xx N/A N/A N/A N/A


Sonic the Hedgehog 2 (16-bit)
Sonic2 title.png

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