These tracks could be used as an audio cue when you:

Level up, found a particular item, task complete, death, achievement, special attack, special ready, loot box opening, received highest loot box level, activate combo, Max energy, headshot, Particular Enemy present or engaged, secret area or item found, etc.

The Style is Metal with various elements of Melodic, Gothic, Epic, Death, Dark, Groovy, Technical and Orchestral.