Here is the full list of all 50 Just Cause 2 achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Reach 75% completion in the normal mode or mercenary mode.
Complete 49 faction missions.
Complete 50 challenges.
Collect 150 faction items.
Kill 30 enemies by mowing them down with vehicles.
Reach 50% completion in the normal mode or mercenary mode.
Collect 1000 resource items.
Drive all 104 vehicles.
Assassinate 25 colonels.
Kill 30 enemies while they're suspended in the air with the grappling hook.
Complete 10 challenges.
Hijack 50 enemy vehicles.
Fly an airplane under 30 unique bridges in Panau.
Get 100 stunt driver points.
Fly an airplane close to the ground for 30 seconds.
Base jump 1000 meters.
Complete 1000 sabotages.
Kill 20 enemies in 60 seconds.
Kill 50 enemies in a row with inventory weapons without losing health.
Reach 100% complete in 100 locations.
Complete 9 stronghold takeovers.
Kill 5 enemies by smashing them with an object tethered to your vehicle with the grappling hook.
Complete story mission 7.
Bonus for completing the game on normal difficulty.
Bonus for completing the game on hard difficulty. Also gives you the bonus for normal difficulty.
Bonus for completing the game on extreme difficulty. Also gives you the bonus for hard and normal difficulties.
Complete story mission 6.
Discover 100 locations.
Kill 5 enemies by dragging them behind a vehicle with the grappling hook.
Kill 5 enemies with the melee attack while they're suspended with the grappling hook.
Complete story mission 5.
Kill 750 enemies.
Kill 30 enemies while they're falling through the air.
Travel 75 kilometers by land vehicle.
Kill 50 enemies using melee attacks.
Complete story mission 4.
Open the parachute and then land on foot 300 meters above the starting height.
Kill 30 enemies by using the grappling hook and making them fall to their death.
Complete 3 stronghold takeovers.
Stand on foot at the highest point of Panau.
Complete 100 sabotages.
Reach 100% complete in 15 locations.
Complete story mission 3.
Kill 50 enemies with headshots.
Collect 100 resource items.
Drive 30 different vehicles.
Complete story mission 2.
Complete story mission 1.
Destroy 30 objects in 60 seconds.
Cause chaos for the first time.