The most ambitious Sonic 2 project ever created!

If you’re a fan of Sonic 2 and like that game the most in the series, then this Sonic The Hedgehog 2 – Anniversary Edition by Sophiedude is your Sonic Euphoria.

This hack/patch of Sonic 2 is jam packed with many customisable options tailor-made to suit every gamer’s needs and wants plus improved graphics done to the colour palette and sprites as well as an enormous selection of music in the sound test with a complete remixed soundtrack of Sonic 2.

FEATURES:

• Amy Rose as a playable character in V4 complete with a modified version of her Sonic Advance Move set.
• Hard mode added with more rings removed and more Badniks and Spikes.
• Eggman has dialogue when you defeat him.
• Easy/Hard Mode available.
• Hill Top Zone is playable in 2P Mode. Highlight Emerald Hill and Hold C and Push Start.
• Brand new remixed soundtrack with the original soundtrack also available.
• The Game Gear and Master System Sonic 2 Soundtrack has been added.
• Cyber City and Hidden Palace are playable. Cyber City needs to be turned on in the Options Menu.
• In a 1P Sonic & Tails game, you can choose whether you want Tails to hit the boss or not.
• There is an air speed cap that can be turned on or off.
• Tails can now fly.
• You can choose to skip Metropolis Zone.
• You can choose what boss music you want for the Silver Sonic boss.
• Each act have been given its own palette and soundtrack.
• Uses Clownacy’s awesome SMPS Cloned V2 sound driver in 68k.
• Drums and samples are super clear!
• Works on real hardware via an EverDrive.
• CheckSum is fixed.
• 2 new features in the Options Menu have been added.
  • Amy Can Roll – This option allows Amy to roll like everyone else – in case you wish Amy could roll.
  • Roll Jump Lock – Normally, when you jump from a rolling state, you cannot move Sonic. if this option is turned on, you can control Sonic just like in Sonic CD or Mania.

IMPORTANT NOTES: 

1. For full archival reasons, there are 3 patches inside the ZIP file, a V2 from 2020, V3 from 2021 and a V4 from 2022. Each patch has the same settings and customisable options to configure with for the player, with each later build adding more content than the previous version. The older builds (V2 and V3) sit at 2 Megabytes/16 Megabits large so you can save state on a Mega EverDrive X7 with these two builds but V4 is just over 4 Megabytes/32 Megabits large and uses the 10 Megabyte mapper which when played on real hardware requires you to disconnect your Mega-CD/Sega-CD attachment in order for it to work and the Mega EverDrive X7 cannot save state with V4 as the ROM mapper is too big.

2. V4 sits just over the 4 Megabyte/32 Megabit limit of 4092K to 4160K.

Like me (Adrian) this proves problematic as I don’t personally have time to sit and play long games in one sitting anymore as the save state mechanic of my EverDrive doesn’t work with this large ROM, so I tend to ignore this later V4 build and play the earlier builds so I can save. On an emulator this isn’t an issue, only real hardware.

3. When playing as Tails in V3, the game crashes at the end of Wing Fortress Zone just after the laser beam fight. V4 fixes this crash and the crash doesn’t appear with the other characters in V2 and V3.

4. V2 and V3 can save state on an EverDrive but V4 cannot which is the main reason they’re archived here along with V4.

5. Interesting discovery, V4 which uses the 10 Megabyte ROM mapper works on Regen emulator when it usually ignores large ROM files and refuses to boot them.

6. All current builds are archived here on RomHack Plaza incase you missed these the first time round over at the Sonic Hacking Contest.

INSTRUCTIONS: 

Inside the ZIP file you’ll find the IPS patches, they’re in classic Lunar IPS format and simply needs to be patched to the ”Sonic 2 (World) REV A ROM”.

ROM hack belongs to Sophiedude.

Enjoy!

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