Wat is het RSDK-bestandsformaat?
Een bestand met de extensie .rsdk is een Retro Engine-data-archief. Het bundelt de meeste assets van een spel in één container: character sprites, tile sets, stage-lay-outs, objectgegevens, configuratiebestanden en Ogg-muziek. Het formaat is afkomstig van RSDK, de Retro Software Development Kit gebouwd door Christian Whitehead en later door SEGA gebruikt voor officiële klassieke Sonic-releases. U vindt deze archieven, meestal genaamd Data.rsdk, in Sonic CD (2011), de Sonic 1 & 2 mobiele remasters, Sonic Mania en Sonic Origins.
De engine heeft verschillende revisies ondergaan en het archiefformaat veranderde bij elke revisie. RSDKv1 en v2 dateren van vroege fangame-builds, v3 werd geleverd met de Sonic CD-remaster uit 2011, v4 met de mobiele remasters uit 2013, en v5 (plus een v5U-variant) met Sonic Mania en Sonic Origins. In een RSDKv5-bestand begint de header met de tekst RSDKv5, gevolgd door een aantal bestanden en een tabel met vermeldingen. Bestandsnamen worden opgeslagen als MD5-hashes in plaats van leesbare paden, en de meeste bestandsinhoud is versleuteld met een aangepast XOR-cijfer.
Beveiliging & veiligheid
RISICO: LOWAn .rsdk file is passive game data, not an executable, so opening or extracting it does not run code. The main practical risk is legal and technical: the assets are copyrighted by SEGA, and repacking a datapack incorrectly can corrupt a game install, so keep a backup of the original Data.rsdk before editing.
Formaatdetails
in een notendop- Renoise Instrument (older builds) - Some legacy references map .rsdk-style names to sampler data, but this is unrelated to the Retro Engine archive and is not the dominant meaning.
Programma's die RSDK-bestanden openen
Windows4 apps
RetroED / RetroED2
Open-source Open RetroED and use Tools > RSDK Unpacker to extract a Data.rsdk datapack into an editable Data folder, choosing the file list that matches the game.
RSDKv5Extract
Open-source Run this command-line tool to unpack and repack RSDKv5 archives such as Sonic Mania's Data.rsdk.
RSDKv5_Extract_Plus
Open-source Use this improved extractor to unpack RSDKv5 and v5U datapacks, including Sonic Origins content.
RSDK-Reverse libraries
Open-source Build against these libraries to parse RSDKv1 through v5 archives programmatically when writing your own tooling. 
macOS1 app
RSDKv5Extract
Open-source Run this cross-platform Python extractor to unpack an RSDKv5 datapack on macOS. 
Linux1 app
RSDKv5Extract
Open-source Run this Python script to decrypt and extract the files stored inside an RSDKv5 .rsdk archive. Technische details
diepe specificaties| Encoding | Binary |
| Byte order | Little-endian |
| Container | Single-file archive holding an entire game's data tree |
| Compression | Per-file; individual assets keep their own encoding (image data, Ogg audio, binary configs). RSDKv5 does not ZIP-wrap the whole archive. |
| Encryption | RSDKv5 obfuscates file contents with a custom XOR cipher keyed from the MD5 of the uppercase filename and the MD5 of the file-size string, plus nibble swapping and rotating key indices. Not a standard cipher. |
| Structure | RSDKv5 layout: 6-byte 'RSDKv5' magic, 2-byte little-endian file count, then one 0x18-byte entry per file (16-byte endian-swapped MD5 of the internal path, 4-byte offset, 4-byte size with bit 31 flagging encryption), followed by the raw/encrypted file data. Filenames are stored as MD5 hashes, so a filename list is needed to recover original paths. |
| Integrity | MD5 hashes of the internal file paths act as lookup keys for each entry. |
| Typical size | Tens of megabytes to over a gigabyte, depending on the game |
| Platforms | Windows, macOS, Linux, Android, iOS, Nintendo Switch, PlayStation, Xbox |
| Notes | Produced by the Retro Engine (originally Retro Sonic Development Kit, 'RSDK'), created by Christian Whitehead. Used by Sonic CD (2011), Sonic 1 & 2 mobile remasters, Sonic Mania and Sonic Origins. Versions RSDKv1 through v5/v5U each differ in header and packing; extraction tools require the matching version and a file list. |
| Uitgebracht | 2011 (Sonic CD remaster, RSDKv3); RSDK lineage from 2007 |
| Laatste versie | RSDKv5 / RSDKv5U (Sonic Mania, Sonic Origins). Newer titles use later revisions. |
| Specificatie | github.com |
RSDK conversies
Community V&A
gevraagd door gebruikersNog geen vragen - wees de eerste om iets te vragen over RSDK-bestanden.
