You will need to have a vortex grenade which is a random drop once the DLC has been installed, you will also need to complete at least the first 3 story missions to unlock the Pripyat map in order to meet the trophy requirements. This can only be done using the vortex grenade and on the Pripyat map, the amusement park appears pretty much smack bang in the middle of the map so when you get near the park try to not kill the enemies and try to make them follow you then when you have at least 6 enemies around you, drop the vortex grenade and if done correctly it will pull in at least 6 enemies where your Trophy will unlock.
You will need to hold a devastator which will be a random drop once the DLC has been installed and this trophy will require 2 players on screen but this can be done either online or in local co-op. The best mission to attempt this is the training mission at the start of the game, both players need to be stood close to each other and fire off the devastator at the same time and with both of the beams crossing each other and then hitting an enemy the trophy will only unlock for the player who earns the killing blow so this may need to be done several times in order for you to get the killing blow where your Trophy will then unlock.
You will need a Collapser for this which will be a random drop once the DLC has been installed. Holding the fire button will charge the Collapser up and when fully charged it will fire a massive blob of energy that will destroy any enemy in its path, the best way to get this is using the horde attack as you will easily get more than 20 enemies chasing you during this mini event so when the game says “horde approaching” switch to your Collapser then press and hold the fire button then release when fully charged and once it hits 20 xenos, your Trophy will then unlock.
Each class in the game has its own primary weapon and they are as follows:
- Saboteur: SMG.
- Tank: Energy Gun.
- Bio Specialist: Xenorifle.
With the season pass installed you will now be able to get random drops of all the primary weapons now, in order to fulfil the requirements you need rare quality or above so that’s the purple or orange variations of each gun. This is just a matter of completing missions and hoping the correct rarity gun drops, with all 3 primary weapons of rare quality or better in your inventory your Trophy will then unlock.