Here is the full list of all 35 Crysis 2 Remastered achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Finish the single player campaign on any difficulty
Complete the single player campaign on Veteran difficulty
Complete the single player campaign on Post-Human Warrior
Find all New York Souvenirs
Reach Central Park
Break the speed limit in front of 10 speed cameras
Locate Jacob Hargreave
Re-route the power in Eye of the Storm without being detected
Complete the evacuation at Times Square
Defend Central Station
Complete 12 levels on Veteran difficulty
Complete 12 levels on Post-Human Warrior difficulty
Assist the evacuation at Bryant Park
Scan all of Richard Morgan's books in the NY public library
Reach the Hargreave-Rasch building
Throw an alien down the sinkhole in Dark Heart
Assist the Marines in Madison Square
Keep all marines alive during the rescue in Semper Fi or Die
Infiltrate the alien hive
Kill 20 enemies with the Microwave cannon
Kill 10 enemies by throwing an object at them
Infiltrate the CELL facility at Wall Street
Complete 6 levels on Post-Human Warrior difficulty
Complete 6 levels on Veteran difficulty
Kill 10 enemies with grab and throw
Find Nathan Gould
Stealth kill 25 enemies
Kill at least 3 enemies with a single grenade
Kill 5 enemies while sliding
Assimilate alien tissue at the crash site
Kill a CELL operator with a giant donut in Lower Manhattan
Escape the Battery Park evacuation center
Kill two enemies with a single bullet
Kill 4 enemies in a row with headshots
Complete In at the Deep End