The The Lost Island Add-on for Crysis 3 has 10 achievements worth 250 gamerscore.
Get the most kills and win by reaching the score limit in a game of Frenzy (Public Match only)
Get 2 kills with each weapon in a round of Frenzy (Public Match only)
Kill the entire enemy team within 60s of activating the radar on Crossing (Public Match only)
Hold the flag for 4 minutes in a game of Team Possession (Public Match only)
Get 30 kills with the flag in Team Possession (Public Match only)
Melee an enemy off the cliff face with a pole on Ascent (Public Match only)
Get an 'Incoming!' Skill Kill from the top of the central rock on Coastline (Public Match only)
Get a kill with a boat Oar (Public Match only)
Complete a match on all four DLC maps (Public Match only)
Slide for 1km on Creek (Public Match only)