Defeat 5 enemies at once with an incendiary grenade. (Campaign Mode)
You might notice that's it's pretty tough to find an incendiary grenade lying around. Luckily, you're guaranteed to find one in Black Side 2-1. Missions don't change the available items, so replay the mission with Gargoyles and break the right most item box. When you pick it up, don't use and wait for the mission to finish. Then, use it on thugs in groups of 5 or more while wandering around in free mode.
The sequel to the award winning Hellblade: Senua’s Sacrifice, Senua returns in a brutal journey of survival through the myth and torment of Viking Iceland. Intent on saving those who have fallen victim to the horrors of tyranny, Senua faces a battle of overcoming the darkness within and without.