SSF2T TAG v2 four players (preview) -- two teams of two for Super Street Fighter II Turbo
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This package makes the four-player game, ssf2t4p.zip, from your own clean ssf2t.zip
(Super Street Fighter II Turbo (World 940223)): the one Fightcade 2 downloads, or MAME's full (non-merged) set with all
23 ROMs. It runs in RetroArch with the SSF2T TAG core from ssf2t-tag-v2-retroarch.zip,
whose launcher also runs this installer for you. Nothing here contains ROM data or
the CPS-2 key.

Windows:  drag ssf2t.zip onto ssf2t-tag-v2-4p-preview.cmd (or put the .cmd beside ssf2t.zip and
          double-click it).
macOS / Linux:  python3 ssf2t_tag_4p_patch.py path/to/ssf2t.zip

Either one writes ssf2t4p.zip and a receipt beside your ZIP and never changes the
original. Keep the name ssf2t4p.zip: the SSF2T TAG core knows the four-player game by it.
Your ZIP must keep ssf2t.key inside it (Fightcade's does).

In the game
  No coins and no Start button: HP+HK joins (or challenges the CPU). P1 and P2 pick
  their team's first fighter, P3 and P4 the second. Ports 1 and 3 are one team,
  ports 2 and 4 the other. Nobody on port 3 or 4: that team's first player plays both.
  In a fight HP+HK tags, and whoever owns the fighter coming in drives it. With the
  gauge full, QCB + HP+HK calls a Variable Cross (the partner's own player drives it,
  specials and supers too) and QCF + HP+HK a team super.
