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Lostbelt No.5: Atlantis Spoiler-free Walkthrough

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Article by NorseFTX
Lostbelt No.5: Atlantis Spoiler-free Walkthrough
Table of Contents

Introduction

  • The spoilers in this walkthrough are limited to what enemies you will face in a particular node. 
  • Every major boss and Servant encounter is initially hidden. Hover over unknown icons to see what mob/Servant is hidden via its hyperlink.
  • Press the New Monster Information or Boss Information headers to see specific spoilers, advice and/or tips.
  • Atlantis is a story heavy experience where many of the encounters are more meaningful through experiencing the story. Try not to rush through it!
  • Break Bars are a standard feature once again.
  • A full Main Story clear requires 905 AP.
  • Story length estimates are courtesy of the Atlas Academy DB.
  • Spotted an error, have a question, or ideas to improve the guide? Feel free to drop a comment in the comments section below!
  • Have fun and enjoy the story! 

Walkthrough

Filler Easy Moderate Hard Very Hard
Node Enemy Classes Enemies & Difficulty Notes

Intro-2
Story only.
Note: Clicking on the Lostbelt Chapter from the main menu has an additional Story section which acts as Intro part 1.
Story - Part 1: ~6min read
Part 2: ~8min read

Intro-3
Story only.
Story: ~9min read

Intro-4
Story only.
Story: ~5min read

Prologue-1
Story only.
Story: ~7min read

Prologue-2
Story only.
Story: ~8min read

St. 1-1
Gold Berserker A new Monster approaches:
A break bar Berserker (705k, 851k HP). Must break 1st HP bar within 8 turns to complete the battle. If the first HP bar isn't depleted within 8 turns, the quest will be failed. Make sure to bring strong sources of single target damage and ways to charge the NP Gauge quickly!
Story: ~6min read
New Monster Information

St. 1-2
Silver CasterGold Berserker New Monsters approach:
A single wave filled with 50 enemies, of mixed Caster (70-90k HP) and Berserker (102-111k HP) class. Defeat 5 enemies to complete the encounter.
Story: ~2min read
New Monster Information

St. 1-3
Gold Lancer Party Restriction: Only Mash (Ortinax) + 2 NPC Support Servants can be deployed.
Battle ends automatically after 1 turn.
Story: Pre-battle ~2min read
Post-battle ~2min read

St. 1-4
Story only.
Story: ~6min read

St. 2-1
Silver Lancer Party Restriction: NPC Charlotte Corday must SOLO this quest.
A single Lancer enemy (39k HP).
Turn 1: AQA
Turn 2: Use all skills and NPAA.
Story: Pre-battle ~4min read
Post-battle ~3min read

St. 2-2
Silver Saber Party Restriction: Only 2 NPC Supports may be deployed. No Mystic Codes or Command Spells.
Three Saber mobs (58-83k HP).
Focus on using Orion's cards for this encounter. When his NP gauge is full (his NP is a self buff NP), make sure his cards are available; pop all three skills and his NP and normal attack cards. If Charlotte is alive, it is possible to down two targets with Orion after NP by choosing cards in the order Orion > Charlotte > Orion.
Story: Pre-battle ~4min read
Post-battle ~2min read

St. 2-3
Silver BerserkerBronze CasterGold Berserker Party Restriction: Only 2 NPC Supports may be deployed.
This time there are two waves; Wave 1: Two Berserkers (40-42k HP) and Caster (52k); Wave 2: A Berserker (108k) and Caster (57k).
The strategy for this encounter is largely the same, although prioritize defeating the Berserkers first as they pose a greater threat to Orion.
Story: Pre-battle ~1min read
Post-battle ~1min read

St. 2-4
Story only.
Story: ~7min read

St. 3-1
Story only.
Story: ~6min read

St. 3-2
Story only.
Story: ~13min read

St. 3-3
Bronze CasterSilver BerserkerGold Caster Two waves; Wave 1: Two Berserkers (42-43k HP) and Caster (53k); Wave 2: Three Casters (56-123k).
Note if the NPC Support is selected, they will have a small ATK and Damage Cut buff.
Story: Pre-battle ~11min read
Post-battle ~2min read

St. 4-1
Silver LancerSilver CasterGold Caster A new Monster approaches:
Three waves with mixed Casters (45-51k HP), Lancers (35-36k), and a larger Caster mob in the last wave (154k HP). Note several of the enemies and the NPC Support Rider have a small ATK and Damage Cut buff.
Story: ~8min read
New Monster Information

St. 4-2
Gold SaberGold BerserkerGold Assassin A new Monster approaches:
Two waves with mixed Saber (65-92k HP), Berserker (61-84k), and Assassin (60-88k) enemies. All enemies and the NPC Support Rider will have a small ATK and Damage Cut buff.
Story: Pre-battle ~1min read
Post-battle ~5min read
New Monster Information

St. 5-1
Bronze ArcherBronze SaberSilver SaberGold Saber Three waves with mixed Archer (29-67k HP) and Saber (30-99k) enemies. The NPC Support Rider will have a small ATK and Damage Cut buff if selected.
Story: Pre-battle ~8min read
Post-battle ~1min read

St. 5-2
Silver BerserkerBronze RiderGold Rider Three waves of mixed Berserker (32-34k HP) and Rider (28-90k) enemies. The NPC Support Rider will have a small ATK and Damage Cut buff.
Story: Pre-battle ~3min read
Post-battle ~2min read

St. 5-3
Gold SaberGold Assassin Two Servant bosses in a single wave: a Saber (303k HP) and Assassin (261k HP). Note the Saber cannot use their Noble Phantasm. If the NPC Support is selected, they will gain a small ATK and Damage Cut buff.
Story: Pre-battle ~9min read
Post-battle ~2min read

St. 6-1
Story only.
Story: ~6min read

St. 6-2
Gold SaberGold BerserkerGold Assassin A single wave with 7 mixed class enemies: Saber (54-63k HP), Berserker (58-97k), and Assassin (54-63k).
If the NPC Support Rider is selected, they gain a small ATK and Damage Cut buff.
Story: Pre-battle ~1min read
Post-battle ~2min read

St. 7
Silver LancerSilver Berserker Two waves with mixed Lancer (49-68k HP) and Berserkers (57-76k). Note the NPC Support Rider will gain a small ATK and Damage Cut buff if selected; the NPC Support Saber does not have access to their NP.
Story: Pre-battle ~16min read
Post-battle ~1min read

St. 8-1
Story only.
Story: ~7min read

St. 8-2
Silver LancerBronze RiderGold Berserker Three waves with mixed Lancer (44-63k HP), Rider (33-69k), and a large Berserker in the third wave (161k). If the NPC Support Rider is selected, they gain a small ATK and Damage Cut buff.
Story: Pre-battle ~1min read
Post-battle ~11min read

St. 9-1
Story only.
Story: ~9min read

St. 9-2
Silver BerserkerGold Berserker A single wave with three Berserkers (111-251k HP). The largest enemy and the NPC Support Rider (if selected) both gain a small ATK and Damage Cut buff.
Story: Pre-battle ~2min read
Post-battle ~4min read

St. 10-1
Story only.
Story: ~4min read

St. 10-2
Bronze RiderBronze CasterGold Caster Two waves with mixed Rider (33-34k HP) and Caster (48-145k HP) enemies.
Note every turn, either a random ally will get Skill Sealed, or a random enemy will get stunned.
Each turn, all party members also receive a random buff of ATK, DEF, or Healing.
Story: Pre-battle ~5min read
Post-battle ~1min read

St. 10-3
Bronze ArcherSilver Archer A single wave with 10 Archer enemies (34-59k HP). If the NPC Support Rider is selected, they gain a small ATK and Damage Cut buff.
Story: Pre-battle ~2min read
Post-battle ~3min read

St. 10-4
Story only.
Story: ~15min read

St. 11-1
Gold Lancer Party Restriction: NPC Support must be selected.
This battle ends automatically after 3 turns.
Story: ~4min read

St. 11-2
Gold Lancer Party Restriction: NPC Support must be placed in the frontline.
Miniboss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~3min read
Post-battle ~2min read
Miniboss Information

St. 11-3
Gold Caster Party Restriction: Mash (Ortinax) must be placed in the frontline.
This battle will automatically end when the boss uses their Noble Phantasm (~5th turn), or if their 4th HP bar is broken.
Story: Pre-battle ~5min read
Post-battle ~4min read

St. 11-4
Story only.
Story: ~2min read

St. 11-5
Story only.
Story: ~11min read

St. 12-1
Gold Ruler A break bar Ruler Servant (577k, 686k HP). The battle ends after breaking their first HP bar.
Note the boss starts by nullifying all class affinity so that both allies and enemies will be neutral to all Classes. As a result, any strong single target Servant of choice can be used as DPS.
Story: Pre-battle ~3min read
Post-battle ~1min read

St. 12-2
Gold Saber Party Restriction: Only Two NPC Supports are allowed.
A single large Saber (161k HP). As usual, focus on using Orion's cards, and when his NP is available, use all his skills and do an NP-X-X brave chain with his cards.
Story: ~5min read

St. 12-3
Silver Caster Party Restriction: Only Mash (Ortinax) and the NPC Support are allowed.
Three Casters in a single wave (49-71k HP). The NPC Support will have a small DEF and Max HP buff; all enemies have a small ATK and Damage Cut buff.
Story: ~2min read

St. 12-4
Gold Berserker Party Restriction: Only Two NPC Supports are allowed.
Two Berserkers in a single wave (70-96k HP). All enemies and NPC Rider have a small ATK and Damage Cut buff; the NPC Rider additionally has a DEF and Max HP buff.
Story: Pre-battle ~3min read
Post-battle ~4min read

St. 13-1
Story only.
Story: ~5min read

St. 13-2
Silver CasterGold BerserkerGold Caster Party Restriction: NPC Support must SOLO this quest. No Mystic Codes or Command Spells available.
A single wave with three Casters (39-75k HP) and one Berserker (44k HP). Focus down the Berserker first; use an AoE NP to clear the wave when available.
Story: Pre-battle ~2min read
Post-battle ~2min read

St. 13-3
Bronze SaberGold Saber Party Restriction: Must bring NPC Support for this quest.
Two waves with six Saber enemies total (51-121k HP). The NPC Support has a chance of gaining a 1-time 1-turn Evade each turn. All enemies and the NPC Support have a small ATK and Damage Cut buff.
Story: Pre-battle ~9min read
Post-battle ~5min read

St. 13-4
Story only.
Story: ~3min read

St. 14-1
Silver Caster Party Restriction: NPC Support must be selected.
Two waves with six Casters total (35-134k HP). Build up NP Gauge during the first wave and unleash it during the second wave. Note all enemies have a small ATK and Damage Cut buff.
Story: Pre-battle ~1min read
Post-battle ~7min read

St. 14-2
Story only.
Story: ~9min read

St. 15-1
Gold BerserkerGold AssassinGold Saber Two waves with mixed Berserkers (68-78k HP), Assassins (56-58k), and a Saber (144k). All enemies and NPC Mandricardo will have a small ATK and Damage Cut buff.
Story: Pre-battle ~2min read
Post-battle ~8min read

St. 15-2
Gold Caster or Gold Saber Party Restriction: Dialog selection determines the chosen NPC Support for the quest.
If Achilles is chosen, all enemies will be Casters; if Orion is chosen, all enemies will be Sabers. There are three waves of enemies (29-153k HP).
Story: Pre-battle ~9min read
Post-battle ~2min read

St. 15-3
Story only.
Story: ~5min read

St. 16-1
Silver LancerSilver BerserkerGold Berserker Three waves of mixed Lancer (30-51k HP) and Berserker (27-134k) enemies. Certain enemies and NPC Mandricardo will have a small ATK and Damage Cut buff.
No story

St. 16-2
Bronze ArcherSilver Archer Three waves of Archers (28-110k HP). If selected, NPC Mandricardo will have a small ATK and Damage Cut buff.
No story

St. 16-3
Gold Archer Party Restriction: NPC Support must SOLO this quest.
A break bar Archer (95k, 107k HP). On break, they will clear their debuffs and gain a small Damage Cut for 5 turns.
Story: Pre-battle ~1min read
Post-battle ~4min read

St. 16-4
Gold Rider A break bar Rider (311k, 352k HP). They start with a small amount of HP regen per turn; on break, they will gain a 1-time, 1-turn Invincibility every turn. They have an unremovable 1-time 50k HP revival when first defeated.
Story: ~7min read

St. 16-5
Gold Rider Party Restriction: NPC Support must be selected.
Miniboss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~1min read
Post-battle ~2min read
Boss Information

St. 17
Gold Assassin Miniboss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~4min read
Post-battle ~9min read
Miniboss Information

St. 18-1
Silver CasterBronze SaberGold BerserkerGold Saber Three waves with mixed Caster (35-104k HP), Saber (33-152k), and Berserker (62k) enemies. Note when the battle starts, all enemies will be stunned for 1 turn.
The NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff; the support Assassin has a small DEF/Max HP buff.
Story: Pre-battle ~6min read
Post-battle ~2min read

St. 18-2
Gold ArcherGold SaberGold AssassinGold Berserker Miniboss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~3min read
Post-battle ~4min read
Miniboss Information

St. 18-3
Story only.
Story: ~9min read

St. 19-1
Story only.
Story: ~8min read

St. 19-2
Story only.
Story: ~7min read

St. 20-1
Story only.
Story: ~3min read

St. 20-2
Story only.
Story: ~2min read

St. 21-1
Gold BerserkerGold SaberGold Assassin Quest condition: Must clear within 5 turns or quest is failed.
A single wave with 5 enemies of mixed Berserker, Saber, and Assassin classes (80-128k HP). The party will start with a 5-turn ATK buff at battle start.
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff.
Story: ~1min read

St. 21-2
Gold BerserkerGold SaberGold Assassin Quest condition: Must clear within 5 turns or quest is failed.
Nearly identical to the previous quest, a single wave with 5 enemies of mixed Berserker, Saber, and Assassin classes (79-132k HP). The party will start with a 5-turn ATK buff at battle start.
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff.
Story: Pre-battle ~1min read
Post-battle ~2min read

St. 22-1
Bronze RiderSilver CasterGold AssassinGold Saber A single wave with 12 enemies of mixed Rider, Caster, Assassin, Berserker (29-58k HP), and one final Saber at the end (73k).
Story: Pre-battle ~3min read
Post-battle ~1min read

St. 22-2
Gold LancerGold Berserker A new Monster approaches:
A large Lancer enemy (379k HP) flanked by two Berserker mobs (88-94k).
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff.
Story: ~2min read
New Monster Information

St. 22-3
Story only.
Story: ~4min read

St. 22-4
Gold ArcherSilver CasterBronze RiderGold Saber Party Restriction: NPC Support must SOLO this battle. No Command Seals of Mystic Codes available.
This battle ends automatically after 5 turns; survive until then to complete the encounter.
The NPC Support starts with an unremovable 1-time Guts. Use the Invincibility skill before the boss's NP turn, due to their NP removing defensive buffs..
Story: Pre-battle ~3min read
Post-battle ~1min read

St. 22-5
Gold AssassinGold BerserkerGold Rider Two waves: Wave 1 has two Assassins (55-56k HP) and a Berserker (74k). Wave 2 is a Rider break bar boss (237k, 265k HP). The boss is immune to Stun/NP Seal/Skill Seal. On break, the boss debuffs the party's DEF and NP Gain for 5 turns.
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff. The Berserker/Assassin enemies also have a small ATK/Damage Cut buff.
Story: Pre-battle ~2min read
Post-battle ~4min read

St. 23-1
Gold AssassinGold BerserkerGold SaberGold Lancer Two waves: Wave 1 has two Assassins (48-49k HP) and a Berserker (56k). Wave 2 has a Saber (70k) and Lancer (293k).
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff. The smaller (<100k HP) enemies also have a small ATK/Damage Cut buff.
Story: ~5min read

St. 23-2
Silver CasterBronze RiderGold BerserkerGold Archer Three waves, with the first with two Riders (35k, 35k HP) and a Caster (46k HP); the second with two Berserkers (52-54k) and Caster (58k), and the third with a large Archer (230k).
Note all enemies that are not "Troop" enemies will randomly gain a debuff each turn (Stun, HP Reduction, NP Bar drain, or DEF Down).
If selected, the NPC Support Mandricardo has a small ATK/Damage Cut/DEF/Max HP buff. All "Troop" enemies and NPC Support Paris also have a small ATK/Damage Cut buff.
Story: Pre-battle ~1min read
Post-battle ~1min read

St. 23-3
Gold SaberGold LancerGold Rider Miniboss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~2min read
Post-battle ~7min read
Miniboss Information

St. 24-1
Story only.
Story: ~7min read

St. 25-1
Gold ArcherGold AssassinGold SaberGold Berserker Party Restriction: NPC Support must SOLO this battle. No Command Seals of Mystic Codes available.
This battle ends automatically after 5 turns; survive until then to complete the encounter.
The NPC Support starts with an unremovable 1-time Guts.
This time, there is an Assassin in the front line; due to them posing a danger via Class Advantage consider focusing it down first and using NPs when available. The backline will bring in a Berserker and a second Saber (and an Assassin afterwards if able to kill enough enemies). As before, use the NPC's Invincibility skill before the enemy NP turn due to the NP removing defensive buffs.
Story: ~6min read

St. 25-2
Story only.
Story: ~11min read

St. 25-3
Story only.
Story: ~4min read

St. 26-1
Story only.
Story: ~7min read

St. 26-2
Silver ArcherGold Caster Boss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~1min read
Post-battle ~1min read
Boss Information

St. 26-3
Gold LancerGold Assassin Boss encounter.
Click on Boss Information below for specifics.

Story: ~1min read
Boss Information

St. 26-4
Gold ArcherGold Lancer Boss encounter.
Click on Boss Information below for specifics.

Story: Pre-battle ~2min read
Post-battle ~4min read
Boss Information

St. 26-5
Story only.
Story: ~5min read
Congratulations! The Chapter is completed! Make sure to check your Present Box for additional rewards after clearing the Chapter.
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About the Author(s)

Twitter: @NorseFTX

Content Director at GamePress. Passionate about fighting games, virtual/augmented reality technology, neuroengineering, and video games in general. Classical Piano Performance, Sprite Art, and Under Night In-Birth enthusiast.

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