Spintronics Power Pack

Bought this to expand the base kit and the extra capacitor and coil pieces finally let me finish the circuits that kept dying halfway. If you already have both Act One and Act Two, the Power Pack slots right in and the puzzles get way more satisfying. Just don't grab it before the base kit or you'll

The extra capacitor and coil pieces finally let me finish the puzzles that needed more current, and the charge indicator actually makes the circuit behavior easier to read. Just make sure you already own Act One, since the Power Pack is useless without it.

The charging parts work as expected, but be aware you really need both Act One and Act Two to tackle all the puzzles—I was a bit disappointed I couldn't use everything right away. Still, it's a solid expansion for the series.