Completing the "Locate the lighthouse" objective with stealth:
When you receive the objective to cross the area using stealth, it can be
difficult since of the lighthouse alarm. Crawl in the grass besides
the hill behind the cabin. Enemies will eventually appear in front of
where you have to cross using stealth. Use the small silenced revolver
to kill them. Do not kill them while standing or sitting. Kill them
while lying down.
Hiding in rocks:
When crouching, you can
actually approach certain rocks and enter them. While inside, you invisible to enemies and can shoot them.
Act I - Complete Act I.
Act II - Complete Act II.
Rookie - Finish the game on Easy difficulty.
Fallen Eagle - Kill 10 eagles.
Flying Knives - Kill 10 enemies with throwing knives.
Heavy Fire - Kill a total of 30 enemies with Browning gun.
Hold Your Breath - Kill 250 people using sniper rifle. (Multiplayer)
One Package, Two Receivers - Kill 2 enemies with one grenade.
Sniper Expert - Deliver 50 headshots.
The Protector of Pontoon - Kill all enemies attacking your pontoon from the riverside on 'Weaken The Regime' level.
No alarm - Finish the 'Under cover of night' mission without having the guards raise an alarm.
Unnoticed - Stealthily enter the manor in 'Better late than never' mission.
You Have to Focus - Kill 15 enemy using concentration mode.
Electrician - Shoot 5 cable lines using sniper rifles.
Act III - Complete Act III.
Captain - Finish the game on Normal difficulty.
Arms dealer - Finish the 'The last hunt' mission.
Close Range - Kill 250 people using pistol. (Multiplayer)
Fast and thorough - Kill all the enemy snipers in 'Appearances can be deceiving' in less than four minutes.
10 shots - Finish the 'The last hunt' mission having fired no more than 10 shots.
Flag hunter - Capture 50 flags from the enemy camp. (Multiplayer)
One Shot, Two Kills - Kill 2 enemies with one shot.
Sharpshooter - Kill 500 people using sniper rifle. (Multiplayer)
Sniper Master - Deliver 100 headshots.
The end of the drug baron - Kill the escaping drug baron in 'Better late than never' mission.
Through the Wall - Shoot an enemy through a wall.
Act IV - Complete Act IV.
General - Finish the game on Hard difficulty.
Laurel Wreath - Win 50 rounds playing online. (Multiplayer)
Seeker - Collect all secrets.
Supplier of Death - Kill 2000 enemies. (Multiplayer)
Collector - Earn all Bronze, Silver, and Gold trophies.