In Falsus Guide is an independent fan-made companion site for In Falsus, the rhythm and card game from lowiro (the studio behind Arcaea), launching on Steam on 9 September 2026. It covers 20 beginner tips, a full demo walkthrough with every song and unlock condition, and a Card Integration reference. Three free browser tools sit alongside the guides: a Blueprint / Iota solver that finds optimal hex placement and estimates Power, Defense and penalties; an encounter loadout simulator for five-card phase order with colour advantage and Resolve prediction; and an Iota farming planner. Everything is documented from hands-on demo testing, free, and available in English and Chinese.
I played the In Falsus demo and kept re-deriving the same Blueprint placements and phase orders by hand. The existing information was scattered across Discord screenshots and unverified numbers, so I built the tools I wanted and wrote down what I could actually verify in the demo, with the basis for every number labelled.