Mini-Game Attack - Havemore than 15 mini-games
Game Room - Have at least one coin game
Duel Dash (easy mode) - Have at least three duel mini-games
Duel Dash (normal mode) - Have at least five duel mini-games
Duel Dash (hard mode) - Have at least seven duel mini-games
Bowser Land - Have all the Koopa Kid mini-games

Cameras In The Dark  -  Cameras that do not use thermographic vision can be be fooled by shooting out all the ambient and direct light sources to darken the area. As long as the light meter is completely dark, these normal cameras cannot see your spy.

Stick Camera Reuse  -  Sticky cameras may be reused in almost any mode as long as they are not destroyed by gunfire or did not use their gas attack.

Tank Movement  -  The tanks you face in Solo Mode are rather tough but they move in preset patterns. Down the gunner sitting in the turret, then watch the tank's gun. When it aims away, that's your cue to move by or above it. The only way to destroy a tank is to throw a frag grenade into the gunner's hatch. Quicksave to make sure you don't squander your grenades.

Choke Hold To Fireman's Carry  -  Hold the (Left Trigger) while grabbing an enemy to choke hold him, then immediately put his body on your spy's shoulder for a fireman's carry.

Knife To The Back To Fireman's Carry  -  Hold the (Right Trigger) to engage a knife attack on an enemy from the back; your spy needs to be standing to bring the corpse into a fireman's carry.

Stun Punch To Fireman's Carry  -  While your spy (mainly Fisher) is standing and adjacent behind an enemy, hold the (Left Trigger) to deliver a non-lethal punch that transitions to the fireman's carry. Note, that this move will still cause mission failure if the person is to be kept awake or alive for an objective.

Easter Egg: Prince of Persia  -  During Stage 5, while infiltrating Displace International, Fisher will be able to come across two guards talking about another great UbiSoft hit the Prince of Persia Warrior Within. It is the small cafe next to a laser filled hallway, past a keypad locked door. A second way to access the room is through a vent, but about half the conversation is muffled due to Fisher being stuck inside a vent.

Whacking North Korean UAVs  -  North Korean UAVs are tough to take down, but they can be avoided. However, if you went with a kit with a sniper attachment, you can take them out with one well placed shot (anywhere on the body).

Stopping The Missile Launch  -  In the final section of the DPRK missile base, Fisher has 3 minutes to stop the missile. From where the missile launches, head right and down into the door to the command center. The abort codes are on the PC to the right of that door. The codes must then be entered in one of the missile command center's PCs, which are the two rooms near the large elevator (lift) leading to the base commander's office on the level above. Assuming you took out all the enemies in that area, the three minutes are more than enough time to abort the missile.