Abyss Mode

Abyss Mode is one of the two new modes featured in the handheld versions of BlazBlue: Continuum Shift II.

In-game description
"Defeat waves of enemies, strengthening your character along the way. Reach the bottom level of Kagutsuchi."

Special mechanics

 * 1) Shop: Here the player uses his accumulated money earned from playing other modes (or Abyss Mode) to buy status boosts or special abilities for his/her chosen character. Items are either unlocked by finding them in Abyss Mode or by increasing the player level.
 * 2) Depth: While fighting enemies in this mode, a "depth counter" will steadily increase, depending on the number of successful hits. After a given depth, players will encounter "boss characters".
 * 3) "Boss characters": These only appear at predestined depths and have special status levels. These vary between the bosses. Early on, the bosses will be buffed-up versions (by way of status levels) of the standard characters, but later on, the player may also encounter strengthened Unlimited characters. After defeating a boss, the player can choose one reward out of five from a list. These are always randomly chosen, but can consist of status boosts, Reward boosts, Special abilities and positive (skip a certain number of floors) or negative (go back a certain number of floors) Depth boosts.

Status levels
Players can equally strengthen their own character to be able to match up with stronger bosses during the course of Abyss Mode. These boosts are listed in four categories. The maximum level of each category is 50. Above that, no more status boosts are accounted for. With level 50 on every status, your character has You can buy initial Status levels in the Shop at the beginning. Those boosts range from +1 to +9. If you were to buy all of them, you could potentially start with Level 45 on all stats. After defeating a boss, you could also get single Status boosts or, albeit rare, a boost to all stats (called "All +1" or "All +2"). This makes for faster level gain on all stats.
 * StrLv: Short for Strength Level. Boosts in this category give more attack power to your character's attacks.
 * DefLv: Short for Defense Level. Boosts in this category give more health to your character.
 * HetLv: Short for Heat Level. Boosts in this category give more Heat to your character at the start of a fight. (This may also affect how much Heat you gain from your attacks. This has yet to be confirmed.)
 * SpdLv: Short for Speed Level. Boosts in this category increase the overall movement speed (walking, dashing, Air Dashing) of your character.
 * twice as much HP,
 * doubled damage,
 * a Heat stat of 100 at the start of a round and
 * doubled speed.

Special abilities
Special abilities come in various forms. They can give another Break Burst Symbol, reduce the Heat consumption for Rapid Cancels to 25% etc. Not all of them are unlocked by player level progress, some of them have to be won from specific bosses.

Only three Special abilities can be active at a time. When a new Special Ability is selected, the top one will be erased and the new one is placed at the bottom. That said, you are better off choosing your abilities wisely, only switching out when truly necessary.

List of Special abilities
Here, all available Special abilities form Abyss Mode will be listed, along with unlock conditions, their in-game description and their prize in the shop.

Note: Some of them will unlock with rising player level. This is NOT listed here. Instead, it is very well advised you raised your player level to 20 before tackling Abyss Mode in full.
 * Auto Heal: Hit points will be restored over a given period of time. (Cost: 1000)
 * First Aid: The amount of HP regenerated after each battle will increase. (Cost: 1000)
 * Blood Sucker: Upon landing an attack on an enemy, enemy hit points will be absorbed. (Unlock by beating the boss on Floor 666. Cost: 5000)
 * Heat Recovery: Heat will automatically be restored over a given period of time. (Cost: 1000)
 * Quarter Rapid: Rapid Cancels can be performed using only 25% Heat. (Cost: 1500)
 * Heat Keeper: Abilities now consume 50% less Heat than before. (Cost: 4500)
 * Human Fortress: Guard Primers will no longer be consumed. (Cost: 2000)
 * Free Barrier: The Barrier Gauge will no longer diminish. (Cost: 3500)
 * Extra Burst: Break Burst can now be performed twice. (Cost: 2000)
 * Super Burst: Increase the power of the Break Burst. (Cost: 4000)
 * Penetrator: All attacks have a chance to become unblockable. (Cost: 2500)
 * Armor Grinder: Chip damage has been increased. (Cost: 2500)
 * Lucky Puncher: Attacks have a chance to deal extra damage. (Cost: 3000)
 * Revenger: Damage increases significantly when remaining HP is low. (Cost: 3000)
 * Balance Breaker: All attacks have a small chance to instantly defeat your enemy. (Cost: 4000)
 * Berserker: Damage increases significantly, but at the cost of HP over time. (Cost: 4500)
 * Counter Puncher: All Counter Hits are now Fatal Counters. (Cost: 1500)
 * Absolute Field: Lower opponent's combative abilities. However, this will cost a percentage of your reward. (Cost: 5000)
 * Maze Walker: The rate at which you go deeper increases. (Unlock by defeating the boss on Floor 999. Cost: 3500)
 * Rainbow: Your character will be surrounded by a colorful aura. (Cost: 3500)
 * Turn Unlimited: Your character will unleash their true potential, becoming unlimited. (Cost: 10000)

Achievements related to Abyss Mode
There are 9 achievements related to Abyss Mode, out of 73 total.
 * Welcome to the Abyss Hole: Defeated the boss on Depth 100.
 * We Have To Go Deeper: Defeated the boss on Depth 300.
 * That's Deep, Man: Defeated the boss on Depth 500.
 * Gotterdammerung: Defeated Ragna, the boss on Depth 666.
 * Seek a Way Out!: Defeated the boss on Depth 999.
 * All You Need Is Love: Did not buy any items when starting the game.
 * ???: Do not buy any starting items and defeat the boss on Depth 999.
 * ???: Defeat the boss on Depth 999 without learning any special abilities.
 * Your Clothes, Give Them to Me: Obtained all of the items from the shop.