A work-in-progress library for modifying files found in 2.5D Sonic games developed by Dimps Corporation
Please take a look at the wiki
A collection of various small (usually command-line) tools utilizing DimpsSonicLib out of the box. Compiled versions of these tools can be found on the Releases page
Unpack/repack AMB files with this tool. Supports most AMB files, with the exception of AMBs in the Windows Phone port of Sonic The Hedgehog 4 Episode I
Unpack Android APK Expansion (.obb) files with this tool. Supports OBB files from both paid and ad-supported versions of Sonic The Hedgehog 4 Episode II
Episode I OBBs are currently unsupported due to the game using a proprietary closed-source file compression solution from Marmalade Game Studio
Note: Re-packing the OBB files is not yet possible, however there are plans to add this feature later on once the format is better understood.