I'm using simultaneous initiative (with an action declaration phase) and one-minute combat rounds for In the Realm of the Nibelungs, both a first for me and my group. Combat mostly runs via Swords & Wizardry Continual Light, a D&D 'retroclone', albeit with some changes (such as simultaneous initiative).
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... "the pedagogy of folk tales," or at least, of playing them. Johann's game in design, Im Reich der Nibelungen ("in the realm of the Nibelungs") draws on Germanic folk literature, including twisted forests, lost children, laws of magic, and monsters you can talk to. Its procedures begin with a smoothish hack of older forms of D&D, but firmly grounded in the travails of young, impoverished knights.