Arc 2: A Past Best Untold

• ▸Arc 2 is named A Past Best Untold and continues the scenario after Arc 1: The First Lie. On Steam it doubles as a hidden achievement — 15.5% of players had reached its end as of September 13, 2026.
• ▸Ten songs form the Arc 2 track group as of v1.0.2c, per the community wiki. The table below lists every one with its four chart levels.
• ▸Arc 2 moves the difficulty ceiling: Enigma FBD 13 sits at the top of In Falsus — one of three charts at that level — and ten charts fill FBD 12, including two demo-era songs that had no FBD chart before launch.
• ▸This page is spoiler-safe by design: song titles, menus and systems only. Story events — and anything past the end of Arc 3 — stay out, following the wiki's streaming-guideline restrictions.

Frames in this guide come from BengaleeHS's multi-hour Arc 2 playthrough on the launch build — the clearest long-form Arc 2 footage available. Every frame links back to the exact moment it was taken.

Story scenes are cut from every frame. What remains is UI: menus, the timeline, song select and encounter gameplay.

In Falsus's story is split into arcs. Arc 1: The First Lie is the chapter the demo covered; A Past Best Untold is what comes after, and the Steam achievement list makes the structure explicit — each arc lands as a hidden achievement in sequence (The First Lie, A Past Best Untold, Every Moment, Heaven's Chains, and later ones we won't name here). The loop you know carries over: scenario nodes on the timeline, Remembrance dives, card integration, and Encounters where the new songs live.

1. 1

   Find A Past Best Untold in the Timeline

   The arc has a Timeline of its own. In the source playthrough it opens with the early days already on the board — Day 1 through 9 — and unread nodes waiting. Everything Arc 2 contains hangs off this path.

   

2. 2

   Check the build you're on

   The source playthrough runs v1.0.2d — a step past the v1.0.2c the community wiki's song data is pinned to. The Arc 2 structure this page describes has been in place across both versions.

   

There is no puzzle to Arc 2 access — it opens through the scenario itself, and the source playthrough picks up with Arc 2 already open. What the arc looks like in motion, step by step:

1. 3

   Keep the deck fed

   Arc 2 Encounters read your Card loadout, and Cards come from the crafting grid — Iotas placed for Power and Defense. The playthrough swings by the crafting board between story blocks.

   

2. 4

   Pick a loadout before every Encounter

   Each Connect Encounter opens on this screen: five Card slots, Total Power against Total Defense, and a difficulty multiplier for the fight ahead. This run enters at 8,100 against 9,400.

   

3. 5

   Meet the arc where it's hardest

   Arc 2's track group holds the game's toughest charts, and Enigma's FBD 13 is the summit — laser walls over full-speed lane work. Our hardest-songs guide breaks it down frame by frame.

   

4. 6

   Clears move the arc forward

   A DIVE CLEARED result — Minerva at AA here — is the loop closing: story node cleared, song beaten, timeline advancing to the next unread day.

   

The community wiki's song list assigns ten tracks to Arc 2: A Past Best Untold, all documented as of v1.0.2c. Chart levels are MIN / EVO / ULT / FBD:

Chart levels from the community wiki song list, verified 2026-09-13. The full 45-song catalog lives on the song list page.→ In Falsus Demo Songs — All 6 Encounter Guides

The demo topped out at à la mode FBD 11. The full game re-drew the top of the chart: Enigma, an Arc 2 track, shares the summit at FBD 13 with Latent Duality and Mémoire. Ten charts sit at FBD 12 — Sin Utopia and Greyscale City from this arc, and demo-era Hyaloüyne and Deep Into The Vibe, which gained FBD charts in the full game. Our hardest-songs guide breaks the new top end down frame by frame.

→ Hardest Songs

No story beats, character fates, route details or endings appear on this page — not even behind a warning. And per the community wiki's note on the official streaming guidelines, content from the end of Arc 3 onward stays undocumented entirely. When that line moves, this page will link to whatever covers it — it won't become the spoiler page itself.

Pages this guide leans on, and pages that lean on it: