STEINS;GATE RE:BOOT Walkthrough – Complete 100% Route
To finish STEINS;GATE RE:BOOT 100%, use this chapter walkthrough: save points, missable calls, email replies, ending branches, and achievements.
To 100% STEINS;GATE RE:BOOT, play Chapters 1–10 once for Mayuri’s ending while collecting Phone Trigger extras, then reload from Chapter 4 for Kurisu flags, then Chapter 10 for the true ending. Save before every Chapter 6–9 D-Mail / PhoneWave prompt.
This page is the route hub. Use True Ending for the six flags, Email Choices to Ctrl+F a subject, and Achievements for missable trophies. Achievement replies and true-ending replies are different chains — do not mix them.
Ending branch map
| Chapter | If you stop here | Continue by | Trophy |
|---|---|---|---|
| 6 | Suzuha ending | Send the D-Mail | Irreversible Reboot / Metaphysics Necrosis |
| 7 | Faris ending | Send the D-Mail | Isolated Jamais Vu / Made in Complex |
| 8 | Luka ending | Call the PhoneWave | Link of Corruption and Rebirth / Fractal Androgynous |
| 9 | Moeka ending | Send the D-Mail | Hide in Darkness / Endless Apoptosis |
| 10 + 0 flags | Mayuri ending | — | Stardust Sky |
| 10 + 1–5 flags | Kurisu ending | — | Paradox Meltdown |
| 10 + all 6 flags | True ending | — | Open The Steins Gate |
Quick saves exist at the start of each chapter if you skipped manual saves.
Prologue
Clearing the prologue grants Prologue of the Beginning and the End. No email flags.
Chapter 1
Quick route. Read normally. On the PhoneWave timer, type garbage ten times for Homerun-level Clumsiness, then enter 120# to continue.
Phone / collectibles. Open sent mail (Memories of the Self), open received mail (Memories of Another), change wallpaper (Vision Projection), change ringtone (First Sound).
Emails.
| Sender | Subject | Reply | Result | Type |
|---|---|---|---|---|
| Mayuri | Upa… | Upa. then Kakeru-kun | Resonant Reaction; RaiNet’s Mascot; first RaiNet batch | Achievement + Collectible |
| Faris | The decisive battle is close at hand nya | Red Southern Cross | Progress on Princesses of Chaos (finishes in Ch.5) | Collectible |
Chapter clear: Time Travel Paranoia.
Chapter 2
Missable calls. Mayuri, then later Kurisu. Ignore any call in the game for Identity of Complete Isolation (save, ignore, reload). Answering Mayuri adds a Mayuri + Faris scene. Answering Kurisu puts her in the Yanabashi Shrine scene.
Emails. Lukako I made sweets. → Family. You only get About my family members. if you answered Mayuri on 8/01 14:29. Reply My sister, then read About my sister. for Cruel Sister.
Chapter clear: Interpreter Rendezvous.
Chapter 3
No ending branch. Daru calls: answer for Daru + Mayuri, ignore for a Kurisu scene.
Start the Gero Froggy chain: Lukako About Frogs → Gero Froggies, then open the attachment.
Faris PHANTASM is the cat's meow starts more RaiNet summaries.
Chapter clear: Butterfly Effect’s Divergence.
Chapter 4
This chapter has two Kurisu chains. The cup-noodle chain is an achievement. The scientist chain is True Ending Flag 1. You cannot treat them as the same path — save and do both across reloads, or do the achievement path on the Mayuri run and the flag path on the Kurisu-flag run.
Achievement path (not the true ending).
| Sender | Subject | Reply | Result |
|---|---|---|---|
| Suzuha | Akihabara’s | peaceful | Warrior Girl’s Pride |
| Kurisu | Did you write it? | Report → Cup noodles | Discontinuous Qualia (read Favor to ask) |
| Faris | Sign of increasing misfortune | He → NyanNyanian | Cat’s Tea Time (read Cat tongue nya) |
True Ending Flag 1 is documented on True Ending. 25% CG trophy can pop here.
Chapter clear: Chaos Theory Homeostasis.
Chapter 5
Faris calls at the start: answer for a Faris extra scene, ignore for a Mayuri extra scene.
Mayuri mail needs a save. Subject What made me happy today:
- Reply
cosplay→ readThe reason→ Passions Best Forgotten. - Reload. Reply
Fubuki-chan and Kaede-chan→ readHuh?→ Princesses of Chaos.
Flag 2 is Kurisu Plans → Traveling expenses (see True Ending). KKB also notes a Chapter 5 extra scene with STEINS;GATE 0 flavor — story detail stays on the differences page.
Chapter clear: Dogma in Event Horizon.
Chapter 6
Optional calls. Not calling Mayuri at the start adds a scene. Later you can call Mayuri or Lukako. When offered Kurisu / Mayuri / Daru, calling one adds that scene; doing nothing adds Suzuha instead.
Save point. End of chapter, D-Mail prompt.
- Do nothing → Suzuha ending / Irreversible Reboot.
- Reload, send D-Mail → continue. Chapter clear Metaphysics Necrosis. 50% CG can pop.
Chapter 7
Kurisu calls: answer for Kurisu, ignore for Faris.
Froggy batches 2 and 3 live here and need Flags 1 and 2 already. See Gero Froggy. Flag 3 is also here.
Save point. D-Mail prompt.
- Do nothing → Faris ending / Isolated Jamais Vu.
- Send D-Mail → Made in Complex.
Chapter 8
Straightforward until the end. Flag 4: Kurisu Explain yourself! (only one reply), then read From an unpopular girl.
Save point. PhoneWave prompt.
- Do not call → Luka ending / Link of Corruption and Rebirth.
- Call PhoneWave → Fractal Androgynous.
Luka’s final act is reworked versus older versions (see differences).
Chapter 9
You can call the PhoneWave or skip for an extra scene where Kurisu calls — answer for more Kurisu, later ignore a second Kurisu call for a Moeka extra scene.
Save point. D-Mail prompt.
- Do nothing → Moeka ending / Hide in Darkness (Gamma worldline — full page).
- Send D-Mail → Endless Apoptosis. 75% CG can pop. Flag 5 is
Contact me, idiot!→Worried.
Chapter 10 / Mayuri, Kurisu, True
If you followed this page without Kurisu flags, you get Mayuri ending / Stardust Sky.
For Kurisu vs true ending, jump to True Ending. Completing every ending grants All Worldlines Complete. Full CG grants 100% CG Achievement. Playing through everything grants Sky Clad Observer.
Cleanup if needed: Message of Oblivion = leave mail unread and finish the chapter or change worldline (KKB suggests a Chapter 6+ skip). After the true ending epilogue, see Secret Post-Credits Scene.
Last verified: August 21, 2026. Steam app 4012810. Uncertain items are marked not yet confirmed.
Sources
- Kiri Kiri Basara 100% Guide (Martin, 19 Aug 2026)
- Kiri Kiri Basara review (13 Aug 2026)
- Kiri Kiri Basara Digital Deluxe review (15 Aug 2026)
- Official English site
- Steam store
- Steam achievements
- Videos used as research (facts extracted, not copied): KKB 100% Guide, KKB review, Noisy Pixel review
STEINSGATEREBOOT.site is an unofficial fan-made guide and is not affiliated with MAGES., Spike Chunsoft, or the game’s rights holders.