Additions to the formula include new weapons, occasional high-speed elevators, and new (offline) multiplayer modes. Those modes include a deathmatch, and competitive modes in which players race to steal secret files from red doors. The secret files, according to the website, are now represented by "TAITO old game pamphlets!"
We don't have to wait long at all to experience the new Action: it'll be out August 30th in North America and August 31st elsewhere, for $9.99/£7.99/€9.99.
Update: Check out some new screens in our gallery.