This event ran from 12 PM PST 24 Febuary 2016 to 12 PM PST 03 March 2016. During that time, players could attack a series of special Bosses to earn rewards. Using Gold Bullets and Green Bullets against these bosses would often grant a reward of some number of Green Hazmats.
Each level of the boss consisted of a number of rounds, with each round having 1-4 enemies to fight. The final round was always against level 131.
Stage 1 = Squeegee Heavy Weapons - Dobie Assassin - Scrubber Heavy Weapons
Stage 2 = Bagboy Assassin - Hauler Heavy Weapons
Stage 3 = Gutter Assassin
Stage 4 = Twinkle Heavy Weapons
Stage 5 = Spectre Heavy Weapons
Stage 6 (Only every 5 levels) = Random Boss
When the event concluded, prizes were awarded to players depending on the number of Green Hazmats they collected:
- 4000 - 1 Debone-3000
- 3000 - 1 Spectre
- 1500 - 1 Natalia
- 1000 - 3 Crate Roll Voucher
- 750 - 1 Rare Crate Roll Voucher
- 500 - 10 Inferno Scratcher
- 200 - 3 Stamina Drink
- 50 - 1 Energy Drink
Note that you also got all the awards for lower numbers, too.
In addition, players were ranked by contribution points. The highest-ranking players got additional rewards:
- Top 10 - 4 Spectre, 1 Super Crate Roll Voucher, 1 Vac Van, 1 Hazmat Suit, 1 Barrels of Super Acid
- Top 25 - 3 Spectre, 2 Epic Crate Roll Voucher, 1 Vac Van, 1 Hazmat Suit
- Top 75 - 3 Spectre, 1 Epic Crate Roll Voucher, 1 Barrels of Super Acid
- Top 150 - 2 Spectre, 1 Epic Crate Roll Voucher, 1 Natalia
- Top 300 - 2 Spectre, 1 Epic Crate Roll Voucher
- Top 600 - 1 Spectre, 1 Epic Crate Roll Voucher
- Top 1000 - 1 Spectre
- Top 1500 - 2 Rare Crate Roll Voucher, 1 Crate Roll Voucher
- Top 2000 - 2 Rare Crate Roll Voucher
- Top 2500 - 2 El Toro, 1 Crate Roll Voucher
- Top 4500 - 2 El Toro
- Top 8000 - 5 Inferno Scratcher, 2 Stamina Drink
- Top 11000 - 5 Inferno Scratcher, 1 Energy Drink
- Top 15000 - 3 Stamina Drink
- Top 20000 - 1 Energy Drink
Note that you did not also get the awards for lower placements.
In addition to that, there were rewards for certain boss levels:
- Level 135 - 3 Stamina Drink
- Level 130 - 3 Energy Drink
- Level 125 - 15 Inferno Scratcher
- Level 120 - 800 Class Coin
- Level 115 - 3 Stamina Drink
- Level 110 - 3 Energy Drink
- Level 105 - 2 Crate Roll Voucher
- Level 100 - 600 Class Coin
- Level 95 - 2 Stamina Drink
- Level 90 - 2 Energy Drink
- Level 85 - 1 Crate Roll Voucher
- Level 80 - 400 Class Coin
- Level 75 - 1 Stamina Drink
- Level 70 - 1 Energy Drink
- Level 65 - 4 Inferno Scratcher
- Level 60 - 300 Class Coin
- Level 55 - 1 Stamina Drink
- Level 50 - 1 Energy Drink
- Level 45 - 3 Inferno Scratcher
- Level 40 - 200 Class Coin
- Level 35 - 1 Stamina Drink
- Level 30 - 1 Energy Drink
- Level 25 - 2 Inferno Scratcher
- Level 20 - 100 Class Coin
- Level 15 - 1 Stamina Drink
- Level 10 - 1 Energy Drink
- Level 5 - 1 Inferno Scratcher
Finally, each level of the boss had a huge list of possible drops, that basically included every item that can be dropped by any other boss in the game plus a few new items:
- File:Item gold bullet the cleaners.png Gold Bullet (The Cleaners) (used for: Nothing)
- Green Bullet (used for: Nothing)
While the event was active, spending Stamina and Energy would sometimes result in some of the following rewards:
- File:Item gold bullet the cleaners.png Gold Bullet (The Cleaners) (ingredient)
- Green Bullet (ingredient)
- File:Item million man boss chat token the cleaners.png Million Man Boss Chat Token (The Cleaners) (used for: Noise in the chat channel for the million man boss)