No official modding API or save modification tool exists for MUA3. Unofficial attempts (e.g., using Checkpoint or EdiZon) are fragmented, often corrupt saves due to improper checksum handling, and lack a unified interface.
| Offset (hex) | Length (bytes) | Description | |--------------|----------------|--------------| | 0x00 – 0x03 | 4 | Magic number ( MUA3 ) | | 0x04 – 0x07 | 4 | Version (e.g., 0x00020001 ) | | 0x08 – 0x0B | 4 | Save slot ID (0-2) | | 0x0C – 0x0F | 4 | Checksum (CRC-32 or custom hash) | | 0x10 – 0x13 | 4 | Player currency (Credits) | | 0x14 – 0x17 | 4 | Enhancement points | | 0x18 – 0x1FFF | variable | Character data (36 playable chars) | marvel ultimate alliance 3 save editor
Analysis and Implementation Considerations for a Save Data Editor in Marvel Ultimate Alliance 3: The Black Order No official modding API or save modification tool