Hoarder triggers a Loud Noise Notification for 4 seconds, whenever a Survivor performs any of the following actions within 32/48/64 meters of your location:

Unlocks a Chest.
Picks up any Item, including Limited Items.
Hoarder spawns 2 additional chests in the Trial.

After damaging a generator, its aura is highlighted in yellow.

Whenever a Survivor enters the dying state, every affected generator explodes, losing 10percent worth of progress, and starts to regress.

Any Survivor repairing a generator when it explodes will scream and reveal their aura for 12 seconds.

Eruption has a cooldown of 30 seconds.

For each Survivor you hook for the first time, No Way Out gains 1 Token.
Once the Exit Gates have been powered, No Way Out activates:

When a Survivor interacts with an Exit Gate Switch, you receive a Loud Noise Notification and The Entity blocks both Exit Gate Switches for 12 seconds and an additional 6/9/12 seconds per Token in your possession, up to a combined maximum of 36/48/60 seconds.

You become obsesses with one Survivor.  When your obsession is hooked, Furtive Chase receives a token, up to a maximum of 4 tokens.

Each token decreases your Terror Radius by 4 meters while in a chase.

When a Survivor rescues the Obsession from a hook, the rescuer becomes the Obsession.

After hooking a Survivor, Pop Goes the Weasel activates for the next 35/40/45 seconds:

Performing the Damage Generator Action on a Generator instantly regresses it by -20 percent of its current Progression, after which normal Regression applies.

After a Survivor loses a health state, Gearhead activates.

While Gearhead is active, the next time a Survivor completes a Great Skill Check while repairing, the perk deactivates and their aura is revealed to you for 10 seconds.