When it hits
From day 15 at 12:00 on the 
Wage Slave's run
Part of 
Zombie Horde - Phase 2, starts with Zombie Horde - Phase 2.
The same wave on the other runs: Student, Warehouse Manager
Who comes, and where
10 zombies: 6 door · 4 window.
Every zombie in it has ×0.9 HP, bites ×5 as hard, on top of the horde setting.
At the door 6
| Zombie | How many | At once | HP each | Bite |
|---|---|---|---|---|
| Office Worker Zombie | 2 | 2 | 117 | 5 |
| Brute Zombie | 1 | 1 | 234 | 15 |
| Crawler Zombie | 1 | 1 | 90 | 5 |
| Neighbor Zombie | 1 | 1 | 81 | 5 |
| Barefoot Zombie | 1 | 1 | 72 | 5 |
At the window 4
| Zombie | How many | At once | HP each | Bite |
|---|---|---|---|---|
| Neighbor Zombie | 2 | 1 | 81 | 5 |
| Office Worker Zombie | 1 | 1 | 117 | 5 |
| Barefoot Zombie | 1 | 1 | 72 | 5 |
What beating it pays
A wave's total HP sets its reward tier. Each tier pays its reward, and the zombies you kill leave loot on the ground.
| Zombie Horde Intensity | Total HP | Reward |
|---|---|---|
| Weak | 799 | Tier 1 |
| Standarddefault | 1,068 | Tier 2 |
| Strong | 1,333 | Tier 2 |
| Very Strong | 1,596 | Tier 2 |
The game also adjusts each wave to how ready your home is (doors, defenses, supplies and how the last wave went), so the HP here is the starting point.
From the game files2
TowerWave 1003
| ID | 1003 |
|---|---|
| EventID | 40635 |
| OwnerCrisisID | 106 |
| ZombieTypeList | [9105,9109,9103,9101,9107] |
| ZombieCountList | [1,1,2,1,1] |
| MaxAliveCount | [1,1,2,1,1] |
| ChargeThreshold | 0.2 |
| TargetSlotTypes | [8] |
| AttackMultiplier | 5 |
| HpMultiplier | 0.9 |
| AttackSpeedMultiplier | 1 |
| SpawnAnchor | ZombieSpawn_01 |
| SpawnInterval | 2.5 |
TowerWave 1004
| ID | 1004 |
|---|---|
| EventID | 40635 |
| OwnerCrisisID | 106 |
| ZombieTypeList | [9103,9101,9107] |
| ZombieCountList | [1,2,1] |
| MaxAliveCount | [1,1,1] |
| ChargeThreshold | 0.2 |
| TargetSlotTypes | [9] |
| AttackMultiplier | 5 |
| HpMultiplier | 0.9 |
| AttackSpeedMultiplier | 1 |
| SpawnAnchor | ZombieSpawn_02 |
| SpawnInterval | 2.5 |