Reverse: 1999 4.0 Gatekeeper Guide: Insanity, Flux and Banners
Reverse 1999 4.0 Overview: Update Time and Story Opening
Pin down what is verifiable first, then discuss the preview material.
What the official site states
The Reverse: 1999 official site currently lists version 4.0.0 with an update date of 24 September 2026, described as "2026 Casket Parade Celebration, version 4.0 'Gatekeeper', now open". That is this guide's first-tier source.
This is a series opener
4.0 is the opening chapter of a new main story series, described in official wording as the opening of the 4.0 main story line . Whole-number version openers usually ship system-layer adjustments, and the one to watch here is Insanity and Flux.
Reverse 1999 Insanity and Flux: What Changes
Insanity and Flux is the mechanism Reverse: 1999 uses to strengthen launch-era and older characters, and 4.0 turns it into a full system.
Which characters are involved
Community preview summaries list 37 and Beryl as the 4.0 Insanity and Flux characters, shipping alongside a new system, new teammates and new Psychubes. The important phrase is "new Psychubes": Psychubes are the equipment layer, so new ones mean old builds need recalculating.
Why to handle it early
Insanity and Flux targets existing characters, and most veteran accounts already own them, which usually makes the upgrade cheaper than pulling someone new. If your account stalled on high-difficulty content in 3.9, check the material requirements for this batch before spending on banners. Check the in-game Insanity page for the material list; the official notice does not publish a citable one for this guide.
Reverse 1999 4.0 Banners: Red Crossbow and Urd
The two names in the preview material
Community preview compilations say Urd returns in 4.0 and Red Crossbow enters this cycle's banners. Red Crossbow was a launch-era crit main damage dealer that players have long asked about, so the interesting question is her upgraded form and matching Psychubes rather than simply acquiring her.
Three questions before pulling
- Do you have teammates for the new system? The preview wording mentions new teammates, which implies a solo upgrade has limited value.
- Do you have enough Psychubes to re-gear?
- Is a limited banner following immediately? Whole-number versions usually tighten the schedule afterwards.
If two of the three answers are "no", keep saving.
Reverse 1999 4.0 Story: Camelot Castle and the Wind Network
What the official broadcast gave us
Developers' broadcast issue 29 states: the mist around Camelot Castle never lifts, the trail of the "wind network" leads on, the flying witch cuts across the sky once more, and a rebel knight slips into the castle to rescue the Lady of the Lake and uncover a secret connected to "soul".
Community preview material further identifies the 4.0 setting as Arthurian legend, with new characters tied to the Lady of the Lake.
Beyond the story
Large versions usually open exploration content alongside the main story, and clearing the story as you go is cheaper than backfilling later. The full mechanics of 4.0's new content have not been published in a citable notice, so read the in-game event page after updating.
Worth noting for anyone who follows the story for its own sake: the 4.0 narrative framing arrived with an unusually specific list of nouns from the developers' broadcast, including the wind network, the flying witch, a rebel knight and the Lady of the Lake. Whether the story resolves any of the long-running threads around Vertin's origins is unknown from the published material, and preview write-ups should not be treated as plot confirmations.
Reverse 1999 4.0 Resource Planning
Priority order
| Priority | Item | Reason |
|---|---|---|
| 1 | Main story progress | Unlocks new systems and resource routes |
| 2 | Insanity and Flux materials | Older characters, usually cheaper than pulling |
| 3 | Psychube acquisition and builds | The new system depends on them |
| 4 | Banner pulls | Decide once the system is confirmed |
| 5 | Outfits and cosmetics | Pure appearance spending |
New players versus returning players
Returning players should prioritise story progress and Insanity materials, because their accounts already hold usable older characters. New players should first assemble one team that can clear the story and treat 4.0's system content as a second-phase goal.
Insanity and Flux is a trap for new accounts for a specific reason: it upgrades characters you do not own yet, or own at low investment. Spending early materials there delays the baseline team you actually need to clear content. The reverse is true for returning accounts. If you left during the 1.x era and came back, your roster is full of characters that Insanity and Flux now upgrades, and that stock of older units is the cheapest power you will get all version.
The whole-number version trap
Versions 1.0, 2.0 and 3.0 have each run this pattern already: a lot of story, dense events, tight banners. The consequence is scattered materials. If any limited rewards from 3.9 are still unclaimed, clear that list before diving into 4.0, because old event deadlines tend to be days away once a new version opens. That cleanup costs little stamina, and nothing gets backfilled once the window shuts.
Reverse 1999 FAQ
Q1: When did Reverse: 1999 4.0 launch?
A: The official site lists 24 September 2026 with version number 4.0.0, described as the 2026 Casket Parade Celebration, version 4.0 "Gatekeeper".
Q2: Which characters get Insanity and Flux in 4.0?
A: Community preview summaries list 37 and Beryl with a new system, new teammates and new Psychubes. This is third-tier information; confirm in-game.
Q3: Is Red Crossbow a rerun or an upgrade?
A: Preview compilations say she enters this cycle's banners. Whether that is the base character or an upgraded form, and the banner rules, are not stated in citable official text.
Q4: Where do I farm 4.0 Insanity materials?
A: This guide has no citable official list. Check the in-game Insanity page for materials and routes.
Q5: What should returning players do first in 4.0?
A: Push the main story to unlock new content, then work on Insanity and Flux materials, which cost less than pulling new characters.
Come discuss in the Gghubs comments.
Reverse 1999 Action Checklist
- After updating, push the story opening to unlock 4.0's new content entry points.
- Open the Insanity page and confirm 37 and Beryl's material requirements before spending.
- Recalculate Psychube builds, because the equipment layer is what changed this version.
- Check whether the new system is actually complete before pulling on banners.
- Returning accounts push progress; new accounts secure one story-capable team first.