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Recent Updates

Sonic 2 - Emerald Safari

Hack of Sonic the Hedgehog 2


This patch is a gameplay overhaul for Sonic The Hedgehog 2 which not only overhauls how to obtain Chaos Emeralds but gives each emerald unique abilities that stack.

A simple save function has also been implemented.

How it Works: In addition to special stages, players can earn emeralds by gaining a continue at the end of each act. Each emerald will give the player new abilities before obtaining Super Sonic form.

These abilities are as follows:

  • First Emerald

Player 1 Gets one extra hit point per life before losing rings. (Does not stack with shields)

  • Second Emerald

Player 1 can stay underwater for extremely long periods of time.

  • Third Emerald

Player 1 now has faster acceleration.

  • Fourth Emerald

Player 1 now earns double rings in normal stages.

  • Fifth Emerald

Player 1 now earns double rings in both normal and special stages.

  • Sixth Emerald

Player 1 can now jump higher.

  • Seventh Emerald

Super Sonic now available.

NOTE: While Tails cannot obtain Super Form as Player 1, he can gain the emerald abilities listed above. Super Sonic form now requires 100 rings in order to activate.

SRAM: Saving: Game saves at each title card screen transition.

Loading: Enter the options menu, highlight player select and press start. Highlighting any other option will exit the options screen.

Game Saves: Current Level and Act Current Emerald Count Selected Players (Sonic and/or Tails)


  • Game will restart if no prior game save is detected. This is intentional as a checksum system in place.

Patching instructions can be found in the readme.

ROM / ISO Information:

  • Database match: Sonic The Hedgehog 2 (World) (Rev A)
  • Database: No-Intro: Genesis (v. 20210226-213851)
  • File/ROM SHA-1: 8BCA5DCEF1AF3E00098666FD892DC1C2A76333F9
  • File/ROM CRC32: 7B905383



RHDN Hack ImageRHDN Hack ImageRHDN Hack ImageRHDN Hack Image


ContributorType of contributionListed credit
BillyTime! GamesOriginal Hacking

User Review Information

User Reviews
Fresh, smart, betterRed Soul09 Mar 20231.0aYes