The Underwater Labs Add-on for Escape Dead Island has 10 achievements.
Find all the underground secondary areas.
Find the underground labs.
Complete the underground labs.
Acquire the walloper.
Acquire the assault rifle.
Kill 10 enemies at long range with the walloper.
Kill 100 enemies with the assault rifle.
Collect all of Ronald's logs.
Kill a Dweller using an environmental hazard.
Stealth kill a Dweller.