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Sonic the Hedgehog 2 Recomp v0.9.0
This Windows x64 release combines the integrated Megamix character/six-player
campaign work with the approved shared-engine performance and save-load fixes.
- Up to six local or online human campaign players; direct LAN remains two peers.
- Optional Mighty and Shadow join the existing party characters. Supply the
matching donor ROMs described in the README; no donor data is distributed. - Discarded rollback frames retain guest-visible sprite evaluation and complete
CPU/VDP/audio scheduling while omitting background composition. - Failed legacy quickstate loads preserve the running state.
The qualified dense replay workload used 7.7% fewer total process cycles.
Ordinary gameplay measured neutral within matching A/A controls. Native and
16:9 comparisons matched full captured audio, pixels and guest state; current
save/load, actual rewind and two-peer LAN rollback passed. The owner accepted
the combined gameplay/audio playtest. Earlier six-peer loopback-relay validation
is documented in docs/SONIC2_MEGAMIX_CHARACTERS.md; Internet/NAT, six physical
controllers and mixed-build or mixed-architecture sessions are not qualified.
Shadow retains the documented corkscrew pose limitation.
Supply your own World Rev A/REV01 Sonic 2 ROM (CRC32 7B905383). Every netplay
peer must use this exact release and compatible content/settings. Keep native
campaign progress; machine quickstates are specific to the current build.