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