Zombie Waves Codex
Events

Decisive BattleDecisive Battle

A five-floor lottery tower. A draw costs 1 · 2 · 5 · 10 Assault Decryptors as you climb, and either pays a consolation prize or promotes you a floor. Promotion does not run on the weight the pool advertises but on a guarantee ladder: the chance rises with every draw spent on that floor and hits 100 % on the last one. Floor five is free — it hands over the grand prize you picked in advance, then the tower resets, and the best of its 24 prizes open only once enough rounds are behind you.

Duration: 10 days
GachaQuestsExchangeBattle passLeaderboard
Floors
5
Draw cost by floor
1 · 2 · 5 · 10
Draws per climb
23.95
Cost of a climb
76.5 Assault Decryptor
The run advertises:

Climb calculator

One full climb is 23.95 draws and 76.5 “Assault Decryptor” on average. Everything the tower asks for is counted in climbs.

Climbs
1
Draws
24
Decryptors needed
77
Price
free

The free ones cover it: 1 climbs fit inside the 170 “Assault Decryptor” quests, the pass and the chests hand over.

Expectations off the guarantee ladder. A run hands out about 170 “Assault Decryptor” for free — roughly 2.2 climbs.

Floors and the guarantee

Promotion does not run on the weight the pool advertises but on a guarantee ladder: the chance rises with every draw spent on that floor and hits 100% on the last one.

FloorCostAdvertisedGuaranteeDrawsAssault Decryptor
118.0%129.579.57
2212%96.813.61
3520%64.522.52
41025%43.0830.8
Floor 1: 1→1.0%, 2→1.5%, 3→2.0%, 4→2.5%, 5→3.0%, 6→3.5%, 7→4.0%, 8→9.0%, 9→14%, 10→25%, 11→60%, 12→100%
Floor 2: 1→2.0%, 2→3.0%, 3→4.0%, 4→5.0%, 5→10%, 6→15%, 7→30%, 8→60%, 9→100%
Floor 3: 1→3.0%, 2→5.0%, 3→10%, 4→30%, 5→65%, 6→100%
Floor 4: 1→5.0%, 2→15%, 3→60%, 4→100%

Grand prizes

The grand prize is picked in advance and handed over on floor five for free. Some of the options open only once enough rounds are behind you.

Custom S-Tier Assault Vehicle Fragment ×20up to 10from round 15
Stellar Cowboyup to 5from round 15
Custom S-Tier Character Chestup to 1from round 12
Darktide Crystalup to 3from round 12
Citadel Sealup to 8from round 10
Stellar Cowboyup to 2from round 10
Blacksteel Mercenaryup to 4from round 8
Custom Tonic Chestfrom round 5
Collectibles Custom Chest (Red)up to 1open from the start
Legendary Hero Crystal ×2up to 2open from the start
Precision Type Memory ×2up to 2open from the start
Valor Tonic Selection Chest ×2up to 2open from the start
Military Workshopup to 5open from the start
Universal Robot Coating (Mythic)up to 2open from the start
Lunar New Year Custom Legendary Card Pack (6-Star)up to 2open from the start
Resilient Tonic Selection Chest ×2up to 2open from the start
Collectibles Random Chest (Red)up to 5open from the start
Custom S Robot Chestup to 5open from the start
Trendy Peak Legendary Card Pack (6+)up to 5open from the start
Level VI modulesup to 5open from the start
Collectible Universal Shard (Red) ×20open from the start
Custom Robot Fragment ×60open from the start
Trendy Superb Card Pack ×3open from the start
Level VI Module Exchanger ×3open from the start

Pools by round

The more rounds behind you, the richer the consolation prizes. Inside a floor a draw takes its slot away for the rest of the climb.

Floor 1
Promotion to the next floor×18.0%
Robot Chest Decryptor×110%
Accessory Supply Crate (Exquisite)×322%
Trendy Premium Card Pack×324%
Action Data×326%
Diamonds×110%
Floor 2
Promotion to the next floor×112%
Accessory Supply Crate (Legendary)×115%
Trendy Evolution Selection Card Pack×328%
Action Data×330%
Diamonds×115%
Floor 3
Promotion to the next floor×120%
Trendy Superb Card Pack×124%
Action Data×332%
Diamonds×124%
Floor 4
Promotion to the next floor×125%
Collectible Universal Shard (Red)×240%
Diamonds×135%

Draw milestones

Counts every draw over the run, whatever floor it was spent on.

50
100
200
400
600
700
800
1,000
1,200
1,300
1,400
1,600
1,800
1,900
2,000
2,200
2,400
2,800
3,200
4,000

What a run hands out for free

Quests, the pass and the daily chests come to about 170 “Assault Decryptor” — roughly 2.2 climbs a run.

10 draws
30 draws
80 draws

Quests

Log in: 1 day(s)
Log in: 2 day(s)
Log in: 3 day(s)
Log in: 4 day(s)
Log in: 5 day(s)
Log in: 6 day(s)
Log in: 7 day(s)
Log in: 8 day(s)
Log in: 9 day(s)
Log in: 10 day(s)

Exchange shop

Paid for in “Action Data”. The best slots open on total draws.

Darktide Generalfrom 1,500 draws×1180,000
Darktide Generalfrom 900 draws×2180,000
Citadel Sealfrom 900 draws×3150,000
Custom Chest (Power Surge)from 800 draws×5120,000
Custom Chest (Hurricane)from 700 draws×5120,000
Custom Robot Skin (Limited)from 600 draws×1150,000
Intrusion Script: ATK Bonusfrom 400 draws×3150,000
S-Tier Accessory Selection Chestfrom 200 draws×380,000
S Character Lucky Bag (Neon Party)×180,000
Custom S-Tier Equipment Chest×575,000
Collectibles Custom Chest (Red)×360,000
Custom S Robot Chest×560,000
Cortical Implant×320,000
Precision Type Memory×320,000
Legendary Tesseract×520,000
Antimatter Energy Block×520,000
Robot Chest Decryptor×1002,000
Discovery Attempt Card×1001,000
Gene Awakening Card×100600
Trendy Evolution Selection Card Pack×100500
Weapon Chip300
Mechanical Fittings200
Reinforce Energy200
Coin50

Assault Battle Pass

Nodes unlock on “Assault Decryptor” spent, the last one at 900. The paid branch costs $9.99.

Assault DecryptorFreePaid
0
30
60
100
150
200
250
300
350
400
450
500
600
700
800
900

Direct packs

Paid bundles — the only way to buy more Assault Decryptor.

×1 a day
×1 a day
×1 a day$0.99
×2 a day$2.99
×3 a day$4.99
×3$9.99
×3$14.99
×5$19.99
×10$49.99
$99.99

Daily leaderboard

1. Rankings based on event items consumed. 2. Board resets daily. Rewards are issued via mail.

#1
#2
#3
#4–5
#6–10
#11–30
#31–50

Game rules

  • 1. Draw Details
  • Each draw consumes Assault Decryptor. The required amount changes based on the floor level.
  • 2. Prize Pool Details
  • The prize pool is divided into 5 floors:
  • Floors 1-4: Start from Floor 1 by default. Each draw guarantees 1 reward. Rewards within the same floor will not repeat. When drawing an [Ascension Prize], you receive all remaining rewards and advance to the next floor.
  • Floor 5: When drawing the Floor 5 Ascension Prize, you automatically return to Floor 1 and the draw consumption resets to Floor 1 standards.
  • 3. Prize Pool Rounds
  • Round completion: Drawing the Floor 5 Ascension Prize counts as completing 1 round.
  • Floors 1-4 rewards: Upgrades based on total rounds completed during the event period.
  • Floor 5 Ascension Prize: Gradually unlocks based on total rounds completed during the event period.
  • 4. Exchange Items
  • You will randomly obtain Action Data from draws, which can be used to exchange for various items in the event shop.
  • 5. Event Notice
  • Please note: Assault Decryptors and Action Data will be converted to small amounts of coins after event ends. Please use them promptly.
  • 6. Leaderboard
  • Ranked based on the number of vouchers consumed for draws. The leaderboard settles daily, and rewards will be distributed via mail.