Full list of all 35 Dead Island Riptide achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Complete all the main quests cooperatively with any number of partners
Mark 100 opponents which were then killed by your co-op partners
Finish all quests in the game
Find all collectibles
Find all the secret files
Find and kill all named champion monsters located in dead zones
Finish hospital quests for Cecil
Find all the volunteer's voice recordings
Find all pages from the guide book
Kill 100 enemies using charge attacks
Kill 10 monsters with one mine
Obtain level 70
Finish quests for Dr. Kessler
Kill the Twins
Kill 100 monsters with thrown melee weapons
Kill 25 monsters with a chainsaw
Obtain level 50
Find 50% of collectibles
Kill 100 monsters using the boat's speed boost
Finish the game
Defeat Harlow
Enter the docks in Quarantine Zone
Make pact with Serpo
Survive the horde on the roof
Gain access to a long-range radio station
Clear out the cinema
Reach Henderson
Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.
Install a total of 5 barricades during hub defense
Successfully defend the tunnel entrance
Kill 100 monsters with a kick
Rescue 20 NPCs that have been grabbed by monsters
Kill 50 monsters by smashing, decapitating or shooting them in the head
Find a boat for use in the jungle
Escape from the ship