Today’s featured promo on MacUpdate offers Tri 2: Tri Again 2.0 for US$7.77 (42% off, retail $13.33). “Tri 2: Tri Again… The Con-TRI-ption — the unusual tri-geared contraption– traverses a triangular game area by feeding a single loop of chain through three motorized gears and three pulleys. The challenge is to master the gearing system to make the Con-TRI-ption go where you want, accumulating fuel and points while avoiding deadly tri-pedoes.” Tri 2: Tri Again 2.0 requires Mac OS X 10.3.9 or later.