AF – Astral Forge : The process of enhancing a weapon through salvaging equipment. This process unlocks when you have at least one piece of equipment that is Legendary (red). It goes from AF1 (Astral Forge 1) to AF3 (Astral Forge 3).
AFK – Away from Keyboard: Not interacting with the game, while the game is open on your device. Example: You can go AFK on Chapter 4 for Kill Farming.
AoE – Area of Effect: Any attack that does damage to more than one target.
AoQ – Armor of Quietus: One of the S Grade armor pieces from the Chaos set of equipment. Used in the DW (Death Walker) build.
ATK – Attack: The attack value associated with your character.
BiS – Best in Slot
C – Chaos
Carry– When someone or something does the majority of the work.
CE – Clan Expedition: Located with the Clan screen. A two part process. The first part requires clan members to complete in 5 stages that will increase the damage they deal to the boss in the second part. The second part is clan members will individually battle a boss to get “Testaments”. This is just a fancy word for medals. The more medals each clan members have, the better rewards the clan gets at the end of each Clan Expedition.
CD – Cool Down: Also known as Cool Down reduction. The time it takes for a skill to be usable again after it is used.
Crit Damage: The bonus damage inflicted on a target by a critical hit.
CR – Crit Rate: Also known as Crit Chance. The chance an attack will land a critical hit. A critical hit is a hit that does extra additional damage.
CX – Clan Exploration: Located with the Clan screen. Clan members participate in getting keys to unlock a boss fight. There are 3 colored keys: Purple, Blue, and Green. Clan members get these keys by selecting different fights such as defeating enemies or pushing a cart to a location. Participating in these fights award members with badges with can be viewed by clicking on “Ranking”. The more badges the clan gets, the more rewards they can claim.
DC- Daily Challenge: A game mode that’s accessible from the Home screen. Lasts 6 minutes and is similar to chapters. You unlock chests with each boss you defeated for a maximum of three chests.
Deathwaker/Deathwalker/Deathword – Equipment build with Legend
DPS: Damage per second
E – Eternal
EC – Extreme Challenge: A game mode that is unlocked after completing all Zone Operations with their respective conditions active. This game mode goes from Floor 1 to Floor 10. You select your skills and battle each Floor boss.
EDF – EDF Supply: One of the chests that you can open in the Shop screen. On rare occasions, it give S Grade equipment.
EE – Ender’s Echo: A game mode where you battle a boss for 3 minutes. This boss does not die and the goal is to do as much damage to this boss within the 3 minutes. Bosses for this game mode rotate periodically. You are then ranked among other people in your group. There are three groups. Novice, Elite, Ace. This game mode resets every season. Your group ranking also resets every season and you can be placed into either Novice or Elite when the season resets.
EF – Eternal Forge: The process of enhancing a SS Grade equipment with the Astral Forge, by using Eternal Cores and a LC (Lightchaser).
EG – End Game: Either equipment, content, or ideas related to players that have been playing the game for a while. Example: EC (Extreme Challenge) is EG (End Game).
Elite – Miniboss that appears with mobs sometimes. Usually has a red circle under it.
Evolve/Talent Tree –
DW – Death Walker: A method of playing the game that revolves around the Chaos chestpiece, Armor of Quietus and other equipment. The idea of this way to play is that Armor of Quietus grants 20 (or 30 with AF3) seconds where you cannot die. This is called Soul State. You do more damage in this state and do not take any damage. This build is considered EG (End Game) and there are other equipment that are included in this build.
EXP – Experience. The little green, blue, and gold pebbles mobs drop after killing them.
F2P – Free to play. Means didn’t spend any money on the game.
FL – Fingerless [Gloves]
Fodder – Scrap material sacrificed for progression.
HE – HE Fuel: Onne of the selectable passive skills that increase range and size of your skills .
HP – Health Points: The amount of health you have.
Kill Farm: To get as many kills as you can. Example: A majority of people Kill Farm on Chapter 4 with Shiny Wristguards.
LC – Lightchaser
LR – Light Runners
Meta: A term taken from other games. Meta means what is currently the best and most optimal characters/gear/strategies. Meta in this game can also mean Metallia who is an SS survivor that is very end game.
MNG – Metal Neckguard
MS – Movement Speed
F2P – Free To Play
P2W – Pay to Win: Spending real life money in this game. Opposite of F2P.
PoT – Path of Trials : A game mode where you battle enemies on multiple floors. Each floor with that is a multiple of 10 (20, 30, 40, …,900, 910, 920, etc), you battle a boss and need to beat the boss in under 1 minute.
QoL – Quality of life. Feature that makes gameplay easier and smoother.
QP – Quick Patrols (Quick Earnings on Patrols )
RC – Regular Challenge
Revival Effect – Means healing effect; has nothing to do with Eternal Suit or Full Metal Suit. It’s a bad translation of “restoration effect”.
RNG – Random number generator (luck)
SoD – Sword of Disorder
S: Grade of a piece of equipment such as Lightchaser. S is a higher grade than normal equipment.
S Chest: A chest that you can open by either using gems or S Supply Key.
S Selector: A chest that lets you select the S grade equipment to get.
SS: Grade of a piece of equipment such as Twin Lance – Starforged Havoc. SS is a higher grade than S.
Trial – tab where Main Challenge, Mega Challenge, Zone Operations are. Trial is often used to refer to Main Challenge.
TL – Twin Lance – Starforged Havoc: A SS grade Eternal weapon that is created by a process called Cosmic Cast. Cosmic Cast is when you salvage Eternal equipment and Voidwaker equipment along with regular equipment in order to create the weapon.
V – Void / Voidwaker
VF – Void Forge: The process of enhancing a SS Grade equipment with the Astral Forge, by using Void Cores and a VP (Void Power).
VP – Void Power
VW – Voidwaker (can also refer to Voidwaker Windbreaker depending on context)
Whale – Someone who spends a lot of money on the game.
: The process of enhancing a weapon through salvaging equipment. This process unlocks when you have at least one piece of equipment that is Legendary (red). It goes from AF1 (Astral Forge 1) to AF3 (Astral Forge 3).
: A game mode where you battle a boss for 3 minutes. This boss does not die and the goal is to do as much damage to this boss within the 3 minutes. Bosses for this game mode rotate periodically. You are then ranked among other people in your group. There are three groups. Novice, Elite, Ace. This game mode resets every season. Your group ranking also resets every season and you can be placed into either Novice or Elite when the season resets.
: A game mode where you battle enemies on multiple floors. Each floor with that is a multiple of 10 (20, 30, 40, …,900, 910, 920, etc), you battle a boss and need to beat the boss in under 1 minute.
) 
tab where Main Challenge, Mega Challenge, Zone Operations are. Trial is often used to refer to Main Challenge. 
depending on context)