The 25th Floor (第25層, Dai 25-sō?) of Aincrad was a floor that was exceedingly more difficult than the 24th Floor, possessing abnormally strong monsters, complex topography and was thus the site of many deaths in Sword Art Online.


The topography of the floor is as complex as a maze with plenty of pitfall traps throughout the floor leading to poisonous swamps.


The Clearers reached this floor in February, 2023. As the floor was exceedingly dangerous when compared to the previous floor, it led to death of many players even while navigating towards the next town due to the amount of traps and powerful monsters throughout the floor. By the time the Clearers reached the Labyrinth, they were already at the end of their rope, with only Kibaou’s motivation allowing them to get back on their feet. However, just before the boss battle at the top of the Labyrinth, Kibaou was misled by false information spread and charged at the boss with only around 40 of his guildmates that couldn’t even make up an entire raid party. By the time the main force reached the boss room, over half of the members of the Aincrad Liberation Corps had died and even the reinforcements suffered heavy casualties. Even with the many casualties, the boss was finally defeated, however, none of the clearers were enjoying the feat of reaching the quarter point in their quest. After the battle, Kibaou and his remaining guildmates left the front lines and arrived on the 1st Floor, where they merged with the mutual-aid organization «MMO Today» led by Thinker and formed a congregation which later became known as the "Aincrad Liberation Force" while the Clearers were reduced to 2/3 of their size before the floor was reached due to the casualties experienced on the floor.

Known BossesEdit

  • Two-Headed Giant[1] (Labyrinth Boss)



Aincrad Locations Navigation Bar
Teleport Gate
Floor Notable locations and landmarks
1 Town of BeginningsBlack Iron Palace, Hidden DungeonMonument of Swordsmen[Navbar 1]Monument of Life[Navbar 2]Chamber of Resurrection[Navbar 3]TolbanaHorunka Village, Medai Village
2 Urbus, Urbus Teleport Gate Plaza, Marome Village, Taran Village
3 Forest of Wavering Mists, Zumfut, Zumfut Teleport Gate Plaza, Dessel
4 Rovia, Rovia Teleport Gate Plaza, Bear Forest, Yofel Castle, Usco Village, Caldera Lake
5 Karluin, Karluin Teleport Gate Plaza, Mananarena, Shiyaya
6 Stachion, Stachion Teleport Gate Plaza, Suribus, Ararro, Castle Galey, Lake Talpha
7 Monster Arena[Navbar 4]
8 Frieven Village, Frieven Teleport Gate Plaza
9 Dark Elf Queen's Castle[Navbar 5]
10 Thousand Snake Castle[Navbar 6]
11 Taft, Taft Teleport Gate
19 Ralberg, Ralberg Teleport Gate, Hill of the Cross, Griselda's Tomb
20 Sunshine Forest
22 Coral Village, Coral Teleport Gate Plaza, Forest House K4, Lake Outside Coral Village
24 Panareze, Panareze Teleport Gate Plaza
25 Giltstein, Giltstein Teleport Gate Plaza, Former location of the Knights of Blood Headquarters
27 Ronbaru Town, Ronbaru Teleport Gate
28 Wolf Plains
35 Forest of WanderingMishe, Mishe Teleport Gate Plaza
39 Nolfret, Nolfret Teleport Gate Plaza, Former location of the Knights of Blood Headquarters
40 Jaileum, Jaileum Teleport Gate Plaza
46 Ant Hill
47 Floria, Floria Gate Plaza, Hill of Memories, Forest of Giant Flowers
48 Lindarth, Lindarth Teleport Gate Plaza
49 Myujen, Myujen Teleport Gate Plaza
50 Algade, Algade Teleport Gate Plaza
55 Granzam, Granzam Teleport Gate Plaza, Knights of Blood Headquarters, West Mountain
56 Pani, Divine Dragon Alliance Headquarters
57 Marten, Marten Teleport Gate Plaza
59 Danac, Danac Teleport Gate Plaza
61 Selmburg, Selmburg Teleport Gate Plaza
65 Old Castle Labyrinth
66 Old Castle Labyrinth
72 Ozmalt, Ozmalt Teleport Gate Plaza, Agarla Village
74 Kamdet, Kamdet Teleport Gate Plaza
75 Collinia, Collinia Teleport Gate Plaza
100 Ruby Palace
  1. Only in New ALO
  2. Only in the SAO official service
  3. Only in the SAO Beta
  4. According to Kirito in Progressive Volume 1, Rondo of a Fragile Blade, Part 1
  5. According to Kizmel in Progressive Volume 3, Barcarolle of Froth, Part 7
  6. According to Kirito in Progressive Volume 1, Aria of a Starless Night, Part 14
ALfheim Online Locations Navigation Bar
Midgard New Aincrad - See Aincard Location Navigation Bar for locations in new Aincrad
World Tree Alne - Virtual Lab (Floating City) - Yggdrasil City
Alfheim Ancient Forest - Butterfly Valley - Swilvane - Legrue Corridor - Legrue - Thule Island - Undersea Temple
Jötunheimr Great Void - Thrymheim
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