Grease Gun
Play as the Germans on Grand Campaign at Son Bridge. Destroy any M5 but do not kill the men intentionally. They will run away. After selecting "Cease Fire", during the next battle in the area the tank men will have powerful grease guns and no tank.
Invisible enemy
During the setup of troops, on either side of the black area you can click around with "Fire" (use the "Troop placement" trick) to get a head start on the enemy. Use this with mortars, tanks, or personnel. The enemy is there, but not seen.
Super troopers
On the game menu, you can change dificulties. Go to "Custom" and click that button. Then, set your troops to "Very Strong", "Always Obey Orders", enemy always seen, units are fearless, and enemy intelligence always available (causes you to see what enemy is thinking, what weapons they have, and how much ammo is remaining). Put the enemy at :Very Weak", thus making your troops almost invincible super troopers.
Troop placement
Before setting up troops, right click to display the pop up menu screen. After this, click "Move", "Move Fast", etc. and click where you want to go.
Grease Gun...