H.A.R.M., or the Holographic Augmented Reality Machine, is a room with virtual training simulators where heroes take on waves of increasingly difficult enemies. These can be engaged solo, with a team of AI Avengers, or with up to three other players. The challenges are pre-determined and available at different difficulty levels.
These rooms can be used to get familiar with the different heroes' abilities and how they work together. H.A.R.M. can be accessed from several areas on the interior of the Chimera.