Strange equipment:
Play map 51 in skirmish or link mode for Allied helicopters firing V2 rockets and Soviets with Allied tanks.

Transport soldiers with Chronosphere:
Take a civilian and make it force fire on the soldier that you want to transport. When the soldier lies down, take the Chronosphere and zip it while avoiding the civilians bullets. This will work because the armor gets higher when the soldier lies down. Use this to send a spy or a thief into the enemy base.

Infantry walks on water:
You can make a infantryman walk on water by telling him to go into a transport ship. When he is just about to enter the ship, quickly pull it away. Then, once the unit is out as far as possible, repeat the process by putting a transport next to a man and telling him to enter, then pulling it away at the last moment. Now you can do this for some distance out to sea, but your man may get stuck and stay still.

Super civilians:
Play map 41 or 43 in skirmish or link mode for super civilians. The green civilians fire Nukes and the blue civilians have Tesla Beams instead of pistols. Use a mad tank for maximum damage.

Ant missions:
Complete the game once. Then, set the difficulty level to "Hard", select "Campaigns", and go to England to access the ant missions.

Ant missions secrets:
Use the Game Shark building modifier codes along with the vehicles and infantry menu codes while in the Ant missions to obtain the following:

Mad Tank = Queen Ant
Demolition Truck = Warrior Ant
Chrono Tank = Larva
Mechanic = Larva
Shock Trooper = 2 Larvae

Cheat mode:
Click on the "Teams" button menu with Circle (or which ever button is currently configured as "Cancel") or the Right Mouse Button. Then, move the pointer over the following icons on the tool bar and press Circle ("Cancel") or the Right Mouse Button on each.

Invincibility
Press Circle or the Right Mouse Button when the pointer is over "Square", "X", "Circle", "X", "Triangle", "Triangle".

Full map
Press Circle or the Right Mouse Button when the pointer is over "Triangle", "Triangle", "X", "Circle", "Triangle", "Square".

Parabomb
Press Circle or the Right Mouse Button when the pointer is over "X", "X", "X", "Circle", "Triangle", "Square".

Chronoshift
Press Circle or the Right Mouse Button when the pointer is over "Square", "Circle", "Triangle", "X", "Circle", "Circle".

Harvest people instead of ore
Press Circle or the Right Mouse Button when the pointer is over "Square", "X", "Square", "X", "Square", "X".

Money
Press Circle or the Right Mouse Button when the pointer is over "X", "X"," Square", "Circle", "Circle", "Circle".

Instant victory
Press Circle or the Right Mouse Button when the pointer is over "Circle", "Circle", "Triangle", "X", "X", "Square".

Instant loss
Press Circle or the Right Mouse Button when the pointer is over "Circle", "X", "Circle", "Square", "Square", "X".

Nuclear attack
Press Circle or the Right Mouse Button when the pointer is over "Circle", "X", "Circle", "Circle", "X", "Square".

Civilians have names
Press Circle or the Right Mouse Button when the pointer is over "Square", "Square", "Circle", "Circle", "Triangle", "Triangle".