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