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
Kill 100 enemies using charge attacks
Finish all quests in the game
Finish the game
Kill 10 monsters with one mine
Defeat Harlow
Enter the docks in Quarantine Zone
Find all the secret files
Find all collectibles
Find and kill all named champion monsters located in dead zones
Obtain level 70
Make pact with Serpo
Find all the volunteer's voice recordings
Survive the horde on the roof
Finish hospital quests for Cecil
Find all pages from the guide book
Gain access to a long-range radio station
Clear out the cinema
Find 50% of collectibles
Finish quests for Dr. Kessler
Kill 25 monsters with a chainsaw
Kill 100 monsters using the boat's speed boost
Reach Henderson
Kill special enemies: Grenadier, Thug, Wrestler, Infected, Suicider, Screamer, Butcher, Floater.
Kill the Twins
Successfully defend the tunnel entrance
Install a total of 5 barricades during hub defense
Rescue 20 NPCs that have been grabbed by monsters
Kill 100 monsters with thrown melee weapons
Find a boat for use in the jungle
Kill 100 monsters with a kick
Obtain level 50
Kill 50 monsters by smashing, decapitating or shooting them in the head
Escape from the ship