Tower of Lost Souls from Soulcalibur IV replaces the Weapon Master mode from Soulcalibur II and the Chronicles of the Sword mode from Soul Calibur III. The goal of the mode is to meet special conditions to reach the top of the tower with treasure chests to collect on each level. Characters can swap out in the middle of battle and it may be possible to perform combination attacks with two characters, but the opponent can switch characters as well. Both custom-created characters and feature characters can be used. Up to 4 floors have to be traversed at once (depending on which floors you've selected) without healing. Also depending on the range of floors selected, 1-3 characters can be used for each floor. After ascending 20 floors you can descend.
While ascending the Tower of Lost Souls, players can open treasure chests by completing certain tasks on each floor. The chests will be filled with items that can be used in Character Creation. If the item has been purchased prior, Gold will given instead.
Players ascending the Tower can unlock different treasure chests based on their given objective:
|Floor||Item from chest||How to unlock|
|1||Soldier's Hat (Male)||Clear the stage without damage taken by an enemy.|
|2||Warrior Trousers (Male)||Clear the stage with no Ring Out from either parties.|
|3||Pauldron (Male)||Switch characters two or more times.|
|4||Warlord's Belt (Male)||Perform three attack throws.|
Clergy Clothes (Female)
|Defeat an enemy with a ring out.|
|6||Wonder Jacket (Female)||Throw an opponent.|
|7||Warrior Trousers (Female)||Clear the stage without missing an attack.|
|8||Armor Ring: Ice Mirror||Switch characters twice.|
|9||Scarlet Blossoms (Female jacket)||Guard against an opponent's attacks three times in a row.|
|10||Silver Boots (Female)||Guard against an opponent's attacks ten times in a row.|
|11||Grim Horn (Female)||Defeat all opponents with a Critical Finish.|
|12||Magus Cloth (Male)||Defeat all opponents with a ring out.|
|13||Pegasus Sallet (Male)||Destroy all the walls.|
|14||Phantom Pavilion: Seesaw||Perform a Guard Impact more than three times.|
|15||Submission Belt (Voldo headgear)||Clear the stage using only the A and G buttons.|
|16||Warlord's Pauldrons (Male)||Clear the stage with 0 time remaining.|
|17||Arm Bandages (Female)||Execute a combo with more than five attacks.|
|18||Kouchu Kabuto (Male)||Stand on all corners of the stage.|
|19||Demonic Kabuto (Male)||Switch characters more than five times.|
|20||Life Gem: Sun||Clear the stage with a Critical Finish.|
|21||Longhua Qipao (Female)||Ring out yourself.|
|22||Honor Boots (Female)||Perform more than four counter hits.|
|23||Frilled Skirt (Female)||Guard more than three times in a row.|
|24||Protect Gem: Cardinal Directions||Perform a combo that deals more than 240 damage.|
|25||Zhuque Changpao (Male)||Perform more than five throws.|
|26||Warthog Cuirass (Male)||Execute a combo with more than ten attacks.|
|27||Iron Gauntlets||Clear the stage without damages taken by an enemy.|
|28||Aculeus Suit (Male)||Have an opponent guard a guard break attack at least twice.|
|29||Menghu Boots (Female)||Switch characters more than five times.|
|30||Spirit Gem: Noniple Heads||Clear the stage without guarding.|
|31||Longming Qippo (Female)||Perform more than five Just Inputs.|
|32||Vane Mask (Male)||Perform a low throw.|
|33||Battle Dress (Female)||Perform three attack throws.|
|34||Power Gem: Warrior Princess||Perform more than three Guard Impacts.|
|35||Warthog Pauldrons (Male)||Clear the stage without switching characters.|
|36||Parlor Blouse (Female)||Clear the stage with 0 time remaining.|
|37||Siren's Helm (Female)||Defeat all opponents with a Critical Finish.|
|38||Gorgon Fauld (Female)||Defeat all enemies with a ring out.|
|39||Kingfisher Greaves (Female)||Clear the stage without changing positions.|
|40||Deer Head||Execute a combo with more than five attacks.|
|41||Minotaur||Perform more than five Just Inputs.|
|42||Demonic Gloves (Male)||Clear the stage without letting opponents use a skill.|
|43||Repel Gem: Iron Shell||Perform an over-the-back throw.|
|44||War Cloak (Female)||Clear the stage with no ring outs.|
|45||Tiger Lily Kabuto (Female)||Defeat all opponents without using any skills.|
|46||Butterfly Salet (Female)||Defeat all opponents without using any skills.|
|47||Succubus Boots (Female)||Perform five throws.|
|48||Life Gem: Jade||Clear stage with a character equipped with the invisible skill.|
|49||Horns of Calamity (Male)||Clear the stage without missing an attack.|
|50||Tiger Lily Breastplates (Female)||Execute a combo with more than ten attacks.|
|51||Tiger Lily Fauld (Female)||Perform more than four counter hits.|
|52||Feathered Wings (Female)||Clear the stage with a Critical Finish.|
|53||Blade Ring: Demon Lord||Defeat all opponents with a ring out.|
|54||Leviathan Pauldron (Male)||Destroy all the walls.|
|55||Priestess Kimono (Female)||Perform three attack throws.|
|56||Leviathan Burgonet (Male)||Perform a combo that deals more than 240 damage.|
|57||Voodoo Armlets (Female)||Ring out yourself.|
|58||Tiger Pauldrons (Female)||Defeat all opponents without using any skills.|
|59||Voodoo Greaves (Female)||Guard against an opponent's attacks ten times in a row.|
|60||Voodoo Breastplate (Female)||Clear the stage without switching characters.|
When descending the Tower of Lost Souls, players can unlock various items:
|B05||Dark Knight's Cloak|
|B10||Blade Ring: Raging Thunder|
|B20||Repel Gem: Fox Demon|
Try to stay alive and defeat your opponents to complete every descending floors without getting K.O.ed. Here are tips and skills needed to stay alive:
1. Always at least have the HP Drain or HP Recovery skills, or if possible, both, but HP Drain is more effective. Have the "A" skill for best results.
2. Shave Damage C skill or if possible, B or A.
3. When you fight the giant kittens (5, 15, 25, 35 Floors), they often block or impact then attack, so be aware of all of your character's moves so you can parry or repel their attacks. When able, use the Unblockable attack, they're not as smart.
4. Know or master the characters' moves you are using.
5. Never let your guard down, no matter how dumb or weak the enemy is.
6. After floor 28, the enemies get tougher. They guard a lot and like to switch characters a lot. Defeat before they keep switching characters. They like to waste your time.
7. Against difficult opponents, go for the Ring Out.
8. On floor 40 Algol is very tough, the easiest way to defeat is with a ring out.
9. The descent has over 40 floors. Floor 40 is the last floor to obtain a treasure chest. The descent may go on forever.