Sonic the Hedgehog 2 v0.9.10

Windows gameplay now uses cooperative event dispatch during window movement and resizing, keeping the frame scheduler active inside Windows' modal event loop. Caption-button tracking also keeps the scheduler's yielding timer active; controlled nested-loop checks pass, while real held Minimize/Close gameplay and audio continuity remain unverified.

This release preserves the previously shipped Sonic 2 competition interrupt/separator correction, launcher settings saved on both Play and Close, combined keyboard/gamepad input, and live Mods preferences. Local rewind retains presentation state and aspect-correct thumbnails with bounded history memory.

Fresh installs enable adaptive widescreen Fit to screen. Existing saved aspect and mod choices take precedence. BATCHED rendering, native IPO/PGO, default-on diagnostics, high-refresh presentation and the existing character effects remain enabled or available as before. ROMs and donor artwork are not included.

Large-party high-refresh smoothing remains unsupported; those parties retain original-rate motion. The owner-deferred glide-jitter, party-slowdown and older unreproduced reports remain open, as does exact REV01 NTSC-U hardware flicker fidelity. A live test's diagnostic recording stopped at the bounded writer capacity; ordinary native and dummy-driver recording/replay checks pass, but the interaction-specific cause remains unverified.