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Add STEINS;GATE 0 Steam startup, title and text support - #569

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owenisas wants to merge 5 commits into
CommitteeOfZero:masterfrom
owenisas:sg0-base
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owenisas wants to merge 5 commits into
CommitteeOfZero:masterfrom
owenisas:sg0-base

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Adds an sg0 profile for the Steam release of STEINS;GATE 0, from startup through the intro movie and title menu into the story text.

Most of the diff is data. opcodetables_sg0.h is CC's table with the slots that differ fitted against SG0's scripts: all 178 scripts decode without desyncs, and the operand layouts match sc3ntist's ZeroDisassembler. The profile has the mounts, movie order, font atlas and save layout, plus the system message box and backlog, which the first boot and the text need. Engine changes are gated on InstructionSet::SG0, apart from two small additions: a spritesheet can be split across two textures (the Steam font is font_a + font_b), and single-sheet fonts can take per-glyph left bearings.

Needs #565, #566, #567 and #568 (the first four commits here). I'll rebase once they're in.

Built and tested on macOS arm64 with the Steam version: it boots to the title menu, and NEW GAME plays the opening with text. Not done yet: the name box and the AUTO/SKIP icons. The phone, saves, menus and EXTRA screens are on branches on my fork, and I'll open them one at a time.

Copilot AI balanced review requested due to automatic review settings October 23, 2026 08:49

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@Emberind Emberind closed this Oct 23, 2026
@owenisas
owenisas deleted the sg0-base branch October 23, 2026 23:05
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3 participants