Secrets
Bonus Wave (Exo-Survival)
To unlock this special wave, complete all tiers and once you unlock Riot (Tier 4) and play it to wave 11, Manticore drones should come by and stun you for about 10 seconds. Once you get back up, lots of "special units" should come after you instead of the usual gunner. Once you complete this wave, you should get the trophy "Exo Survivor" and a special cut-scene should play.
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.