Syndicated - 20
Complete the game on any difficulty
Simple. Complete the game. It's not difficult on normal mode. Never forget to abuse your DART overlay and breach applications. They will make the game a snap.
Business Is War - 50
Complete all chapters which track difficulty, on hard difficulty
Some people will have problems with this. Be sure to take upgrades that will help your survivability (health, damage mitigation). Make use of your apps when appropriate, like using persuade when overwhelmed by enemies, or suicide when enemies are clustered.
Complete chapters 2, 3, 4 and 5 on normal or hard difficulty
Campaign: EuroCorp - 20
Complete chapters 7 and 8 on normal or hard difficulty
Campaign: La Ballena
Complete chapters 10 and 11 on normal or hard difficulty
Complete chapters 12, 13, 14 and 15 on normal or hard difficulty
Welcome to EuroCorp - 5
Complete Wakeup Call
Unmissable. Complete the first level.
See No Evil
Defeat Kris without making him visible using EMP or DART Overlay, on normal or hard difficulty
In chapter 15, Kris will cloak at the beginning of the fight, and stay cloaked. You will have to look for the light bending around him to figure out where he is to avoid using EMP and DART. He's not too difficult on normal, and Razorback ammo is plentiful around the room on the shelves. Just slog it out until he's dead. If you have trouble seeing him, stand still, and look in the direction you hear footsteps.
Defeat the final boss without allowing any agent to be revived, on normal or hard difficulty
This occurs at chapter 20. The trick here is bringing both of the twins down to critical health. Attack the main boss above until staggers, so he can't interrupt your attempt. Take down the twins side by side, and then execute them quickly. It shouldn't be too difficult. Just be sure to lower their health as much as you can before you start the execution process.
Missile Command - 30
Breach an entire barrage of five missiles in the Ramon boss fight, on normal or hard difficulty
In chapter 11, Ramon will drop an EMP grenade before he launches a barrage. His SWARM laser will turn blue to warn you. Quickly stomp the EMP grenade (it'll be at his feet) and run in the opposite direction from Ramon. As soon as he fires his barrage, mash the DART overlay on, and breach all five missiles.
Top Marks - 15
Achieve a perfect result in all the Tutorial challenges
There are three tutorials, one for each breach application. Follow the directions, and they should be straight forward. The hardest one will probably be persuade. Use persuade on enemies on the higher ground to maximize how useful they are. Line up a headshot with your pistol for enemies on the ground, as there aren't a whole lot. Any tutorial you fail you can immediately retry, and can be loaded from the chapter select menu.
Golden Handshake - 5
Achieve CEO ranking on any level
This isn't too hard. Go for breach spikes, accuracy, completion time, head shots and rampages. Obviously, the better you play, the easier this will be, but the simplest thing to go for to shoot your score up is breach spikes and head shots. You can get away with taking extra time this way.