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