Shadow Trials - Breaking the Frontline

Figure out the lantern locations. You'll freeze to death if you don't clear the cold in time. Try to fight near the lanterns if possible. It's best to take out snipers as quickly as possible. You can switch your assault rifle to sniper mode and counter-snipe, but they're so fragile that they'll go down almost immediately even if hit by a grenade, so you can just blast them with a grenade. The medics that appear later also provide shields to enemies, so let's prioritize taking them out. If you throw an ice grenade into a cluster of enemies and then use a fire grenade with the line "Explosions are art" while casting melt, the enemies will happily "die". The boss is nothing special. Just slide when it tries to attack to dodge. Keep in mind that a fully charged ice assault rifle sniper shot is stronger than 3 regular sniper shots. To get the final reward, it's easier if you go for no deaths. You lose 30 seconds each time you die.