Holographic Augmented Reality Machine (HARM) Rooms are training simulations accessible from the War Table. They provide a safe environment to practice combat, test new builds, and complete specific challenges. There are both tutorial HARM Rooms and more advanced challenge HARM Rooms.

HARM Room Types:
- Tutorial HARM Rooms: Introduce basic combat mechanics and hero-specific abilities.
- Challenge HARM Rooms: Feature waves of enemies with increasing difficulty, often with specific modifiers or objectives. Completing these rewards XP, gear, and sometimes unique cosmetics.
- Hero-Specific HARM Rooms: Unlock as you progress with each hero, offering challenges tailored to their abilities.
HARM Rooms are an excellent way to level up new heroes, experiment with different skill tree choices, and refine your combat techniques without the pressure of a live mission. They are also a reliable source of experience points and basic gear, making them valuable for early-game progression and for testing new gear combinations before taking them into more challenging content.