From Halopedia, the Halo wiki

This article is about the Halo Infinite in-game event. For the armor core, see OSTEO combat engineering suit.


Fractures: Firewall


Tenrai II

Full clean key art for the Hazmat event.

Start date:

June 27, 2023[1][2]

End date:

July 11, 2023[1]

Number of tiers:


Includes content for:

Halo Infinite


HAZMAT is a multiplayer event for Halo Infinite. HAZMAT will be held between June 27 and July 11, 2023, during Season 04: Infection. The event is themed around HAZMAT personnel and its rewards focuses on the Hazmat armor core.[1]

Event Pass tiers[edit]

Players can progress through the Event Pass and unlock items by completing any of the ten event challenges over the two weeks the event is available.[1]

Tiers 1 to 10[edit]

Level Unlocks Images
1 Charm - High Voltage High Voltage charm icon image
2 Hip Attachment (Hazmat) - Dualpack Dousers Dualpack Dousers Utility Icon.
3 Armor coating (Hazmat) - Highlit Steel Icon of the Highlit Steel armor coating.
4 Chest Attachment (Hazmat) - LifeGuard SWT-PRO LIFEGUARD SWT-PRO Chest Icon.
5 Helmet (Hazmat) - Notus HINF Notus Helmet Icon.png
6 Visor - Amethyst Angle Amethyst Angle Visor Icon
7 Helmet Attachment (Notus) - Moonbeam Icon image of the Moonbeam helmet attachment for the NOTUS-class helmet.
8 Left Shoulder (Hazmat) - BioLocker BIOLOCKER left shoulder icon.
9 Right Shoulder (Hazmat) - BioLocker BIOLOCKER right shoulder icon.
10 Stance - Telemetry Check Telemetry Check stance icon.

An additional reward was made available for those who logged and played Halo Infinite during the Hazmat event:

Requirement Unlocks Images
Play Halo Infinite during the Hazmat Event. Backdrop - War Storage War Storage backdrop icon.