View source for Sonic the Hedgehog 2 (CENSOR prototype)

{{ProtoBob
| bobscreen=S2b4 titlescreen.png
| final=Sonic the Hedgehog 2 (16-bit)
| system=[[Sega Mega Drive]]
| date=1992-09-1X
| romsize=1 MB
| source=EPROM cartridge
| foundby=CENSOR, [[User:Drx|drx]], Evilhamwizard
}}
The '''''Sonic the Hedgehog 2'' "CENSOR" prototype''' is a [[prototype]] build of ''[[Sonic the Hedgehog 2 (16-bit)|Sonic the Hedgehog 2]]'' for the [[Sega Mega Drive]].

The prototype itself is very similar to the [[Sonic the Hedgehog 2 (beta 4)|first of the numerous internal testing prototypes]] from the Sega QA Archive. However, there are a number of differences in this build that place it before "beta 4", and could potentially be the missing "beta 3". Most of the differences in the build compared to "beta 4" are mainly found in [[Chemical Plant Zone]] and [[Wing Fortress Zone]].

The original ROM was modified to include a scene intro and to bypass the copy protection. The header was also modified in an effort make the title easier to see when selecting the game from a copier, and the serial number was altered to the one from ''[[sega:Wani Wani World|Wani Wani World]]''. A modification of the ROM was also released on [[Hidden Palace]] that removes the intro and restores the ROM back to the way it was meant to be.

The original build date is unknown due to it being hacked, but because of how similar it is to Beta 4, it was likely built sometime in September.

==History==
This build was originally released on November 9th, 1992 by an old ROM dumping group known as CENSOR, just a few weeks before the game's final release, only to be forgotten in favor of a dump of the final game by a group called MAGICAL. Partially due to people not wanting a prerelease version of ''Sonic 2'' at the time (yes really).{{ref|http://hiddenpalace.org/News/What_Was_Once_Old_Is_New_Again}} It wasn't until February 14th, 2019 that [[User:Drx|drx]] and Evilhamwizard discovered the prototype in old scene releases and released the prototype on [[Hidden Palace]].

==Comparisons==
{{mainArticle|{{PAGENAME}}/Comparisons}}

==Cheat codes==
The [[Level select]] and [[debug mode]] are both enabled by default in this prototype. Simply press {{A}} + {{Start}} when selecting "1 PLAYER" on the title screen to access the level select, then hold {{A}} when selecting a Zone to activate debug mode. However, like in "beta 4", debug mode is limited in that accessing edit mode is not possible.

{{cleanup|This section needs moving to the comparisons page(s)}}
* Collision is different to later prototypes.
* Hidden Palace still has some leftover collision data which was deleted in Beta 4.
* Sky Chase has more rings present.
* Special Stages take a '''long''' time to load, this is because the art is compressed in separate archives. This was fixed in Beta 4 by having most art compressed together in a single archive.


== Hidden Palace Zone ==
Through rom hacking a save state,  you can enter hidden palace zone and some zone ID levels too. Hidden palace is still a total mess but more stable then the final version still having enemy data.


==Downloads==
{{Multidownload
| file1=Sonic the Hedgehog 2 (CENSOR prototype).zip
| filename1=ROM with no loader or scene edits
| filesize1=701 KB
| file2=Sonic the Hedgehog 2 (CENSOR prototype with cracktro).zip
| filename2=Original release from CENSOR (converted to BIN)
| filesize2=704 KB
}}

==External links==
*{{LinkRetro|topic=38434|title=Sonic Retro discussion thread}}
*[http://hiddenpalace.org/Sonic_the_Hedgehog_2_(CENSOR_prototype) Hidden Palace release page]
*[http://hiddenpalace.org/News/What_Was_Once_Old_Is_New_Again Hidden Palace news page: What Was Once Old Is New Again]

==References==
<references/>

{{S2CENSOROmni}}
{{S2MDOmni|4}}
[[Category:Sonic the Hedgehog 2 (16-bit) prereleases]]