For the "Human Light Switch" achievement...

Hint by i_love_games11 on October 27, 2006  |  report this hint

The easiest way to get this is to use your emp pistols secondary function to put out lights on the first level. After you get above the ice from swimming underwater there will be lights all around. Use your pistols secondary function and put them out. After about 30 seconds they will re appear so you can put them out again.

To get the Best ending...

Hint by i_love_games11 on October 27, 2006  |  report this hint

WARNING!!! SPOILERS BELOW!

To get the "Hero" achievement, two of the three of these must survive:

1. You must prevent the cruise ship from exploding. (best decision is frame the girl)

2. Do not kill Hisham. When you are on the sniper shoot the soldier next to him wearing a red cap.

3. Do not kill Lambert. Instead shoot Jamie next to you, but watch out, the whole JBA will come after you.

How to get the "Invisible man" achievement...

Hint by i_love_games11 on October 27, 2006  |  report this hint

The easiest way to do this is to play the level "JBA Head Quarters 1." When you start, finish the training course and shooting range. Then simply wait it off. You may not have enough trust to survive with the NSA so you may have to do a mission for NSA. (Placing trojan in server is easiest.)

How to get "Getting technical" achievement...

Hint by i_love_games11 on October 27, 2006  |  report this hint

Play the prison leveland play up until you have gotten to the tower building. Look for the Riot Shotgun (location can be found by hacking into a computer and reading email) and shoot 5 people. Another way is to use the sticky camera attachement on your main gun. Any other NON LETHAL weapon will work.You can get this from all of your missions, meaning you wont have to get all 5 knock outs in one level.

Two Secret achievements...

Hint by i_love_games11 on October 27, 2006  |  report this hint

WARNING!!! SPOLIERS BELOW!

Two of the secret achievements are save lambert and hisham. These are easy. When the mission comes just dont shoot them. If you dont want to take that path then save it before, kill him, get the achievement, and reload your data. The rest of the secrets are completing the story mode missions and beating the game.

easy kill as spy in dawn waves

Hint by ZackyV is God on May 18, 2007  |  report this hint

on top of the building with the green terminal in it there should be a window by the wall and the floor. Have one person jump through the wall window and jump into the cielling. Have another person break the glass on the floor and hack the green terminal and once a merc comes by the window have the guy by the terminale hide behind the back and the spy in the cielling jup out behind the merc and snap his neck.

Two guards

Hint by oblivionrules on May 29, 2008  |  report this hint

When going up against two guards don't just jump out of the shadows and shoot because that won't work youll most likely get pretty hurt. So just wait in the shadows, when they pass you grab the guy in the rear and shoot the guy in front fast then kill the guard that your holding.