Many users search for specifically because they want to know why Heavyocity chose Kontakt over a standalone engine like their own "Portal" or "Vocalise 2."
If you use Kontakt Player, Damage 2 will work in "demo mode" for 15 minutes unless you have a licensed serial. Once you pay for Damage 2, Heavyocity gives you a serial that unlocks it permanently in Kontakt Player. heavyocity damage 2 kontakt