Max out all the skills that allow you to level up.
Earn 150 different medals.
Use all the weapons in the game and kill ten enemies with each of them.
Defeat 100 enemies that have come out of a chrysalid.
Collect all the serpent emblems.
Let's see those piloting skills!
Take down an enemy from 50 meters away with a headshot using the thermal scope.
Knock ten enemies off a high place.
Collect 3 figures.
Counter an enemy's attack three times in row.
Defeat ten enemies with a stun rod charge attack.
Helicopters sure do pack a lot of punch, but there's nothing like getting up close and personal.
Continue playing to unlock this secret achievement.
Complete the entire game on Amateur.
Complete the entire game on Normal.
Complete the entire game on Veteran.
Complete the entire game on Professional.
Complete Chapter 5 in Chris' campaign.
Complete Chapter 4 in Chris' campaign.
Complete Chapter 3 in Chris' campaign.
Complete Chapter 5 in Jake's campaign.
Complete Chapter 4 in Jake's campaign.
Complete Chapter 3 in Jake's campaign.
Defeat 500 J'avo.
Complete Chapter 2 in Chris' campaign.
Complete Chapter 1 in Chris' campaign.
Complete Chapter 2 in Jake's campaign.
Earn a level-four title.
Complete Chapter 5 in Leon's campaign.
Complete Chapter 1 in Jake's campaign.
Complete Chapter 4 in Leon's campaign.
Complete Chapter 3 in Leon's campaign.
Complete Chapter 2 in Leon's campaign.
Defeat 500 zombies.
Kill the bad guy, save the girl.
Defeat an enemy while dying, then recover without any help.
Customize your dog tags.
Earn 10 different titles.
Complete Chapter 1 in Leon's campaign.
Use a stealth attack to take down five enemies.
Perform a coup de grâce on ten enemies.
Defeat 20 enemies with the Hydra using a quick shot.
Help or rescue your partner ten times.
Purchase one skill.
Complete the tutorial.
Send 2,000 enemies to your opponent's map.
Defeat your opponent and achieve victory in 3 stages.
Achieve a 30-combo chain.
Defeat your opponent 10 times with enemies you sent.
Win while in the dying state.
Win five times in a row.
Defeat 100 agents.
Survive to the end only using physical attacks.
Return to the game as a human character.
Win without any members of your team being killed.
Defeat Ustanak 20 times.
Defeat Ustanak without anyone on your team being captured.
Eliminate all players as Ustanak in less than a minute.
As Ustanak, capture a total of 50 humans.
Defeat Ustanak with only one Agent remaining.
Defeat 100 player-controlled agents and 100 player-controlled creatures.
Defeat the BSAA 100 times.
Defeat the BSAA as a creature without dying once.
Win 10 times.
Protect the BSAA without any of them getting hurt.