When it hits
When the story calls it on the Student's run
Part of 
Aid Response Horde, starts with Wave 1 - Day 1.
The same wave on the other runs: Wage Slave, Warehouse Manager
Who comes, and where
33 zombies: 19 door · 14 window.
Every zombie in it has ×1.94 HP, bites ×8 as hard, bites ×1.1 as often, on top of the horde setting.
At the door 19
| Zombie | How many | At once | HP each | Bite |
|---|---|---|---|---|
| Office Worker Zombie | 4 | 3 | 252 | 8 |
| Barefoot Zombie | 3 | 2 | 155 | 8 |
| Soldier Zombie | 2 | 2 | 427 | 32 |
| Worker Zombie | 2 | 2 | 388 | 16 |
| Crawler Zombie | 2 | 1 | 194 | 8 |
| Nurse Zombie | 2 | 1 | 213 | 8 |
| Neighbor Zombie | 2 | 1 | 175 | 8 |
| Hulk Zombie | 1 | 1 | 970 | 64 |
| Armored Crawler Zombie | 1 | 1 | 369 | 16 |
At the window 14
| Zombie | How many | At once | HP each | Bite |
|---|---|---|---|---|
| Office Worker Zombie | 3 | 2 | 252 | 8 |
| Worker Zombie | 2 | 1 | 388 | 16 |
| Nurse Zombie | 2 | 1 | 213 | 8 |
| Barefoot Zombie | 2 | 1 | 155 | 8 |
| Hulk Zombie | 1 | 1 | 970 | 64 |
| Armored Crawler Zombie | 1 | 1 | 369 | 16 |
| Soldier Zombie | 1 | 1 | 427 | 32 |
| Crawler Zombie | 1 | 1 | 194 | 8 |
| Neighbor Zombie | 1 | 1 | 175 | 8 |
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 | 7,531 | Tier 3 |
| Standarddefault | 10,025 | Tier 3 |
| Strong | 12,535 | Tier 4 |
| Very Strong | 15,033 | Tier 4 |
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 4115
| ID | 4115 |
|---|---|
| EventID | 52471 |
| OwnerCrisisID | 216 |
| ZombieTypeList | [9108,9110,9104,9102,9109,9103,9106,9101,9107] |
| ZombieCountList | [1,1,2,2,2,4,2,2,3] |
| MaxAliveCount | [1,1,2,2,1,3,1,1,2] |
| ChargeThreshold | 0.2 |
| TargetSlotTypes | [8] |
| AttackMultiplier | 8 |
| HpMultiplier | 1.94 |
| AttackSpeedMultiplier | 1.1 |
| SpawnAnchor | ZombieSpawn_01 |
| SpawnInterval | 2 |
TowerWave 4116
| ID | 4116 |
|---|---|
| EventID | 52471 |
| OwnerCrisisID | 216 |
| ZombieTypeList | [9108,9110,9104,9102,9109,9103,9106,9101,9107] |
| ZombieCountList | [1,1,1,2,1,3,2,1,2] |
| MaxAliveCount | [1,1,1,1,1,2,1,1,1] |
| ChargeThreshold | 0.2 |
| TargetSlotTypes | [9] |
| AttackMultiplier | 8 |
| HpMultiplier | 1.94 |
| AttackSpeedMultiplier | 1.1 |
| SpawnAnchor | ZombieSpawn_02 |
| SpawnInterval | 2 |