In the recent 1.01 patch, Dead Island’s upcoming DLC has been added to the game’s trophy list. Here are all 10:
Wave And Smile (bronze)
Survive a wave of enemies in any Arena.
Extreme Firefighting (silver)
Set 5 enemies on fire and then kill them with explosives.
Out of honey? Chew bees! (bronze)
Survive 5 waves using only your fists and legs.
Complete a set (bronze)
Kill enemies of 6 different types during a single round.
Looking for trouble (bronze)
Survive 5 waves in each of the 4 Arenas.
Stick it to the enemy (bronze)
Survive 15 consecutive waves using analog combat controls.
Gladiator school (bronze)
Survive 15 waves with each of the 4 characters.
Survive 10 consecutive waves using only custom weapons.
Morituri te salutant (silver)
Survive 30 consecutive waves with at least one co-op player.
Death Incarnate (silver)
Survive wave 30.
Extra trophies are always nice, but I highly doubt anyone needed much of a reason to continue bashing in zombie skulls.