This week, we play Horde, a physics-based zombie horde simulator by bl4st, a.k.a Paul Berne. It’s an incredibly fun and surprising mechanic, one that involves controlling an almost liquid-like horde of walking corpses—or, as Jordan puts it, an “undulating morass,” much to Blake’s amusement. The game prompts a discussion about physics simulation, flocking algorithms, and real-time strategy games of the late 90s.