Giant ant missions:
At the title screen, hold [Left Shift] and click on the round speaker.

View credits:
At the title screen, click on the Westwood logo.

Free men:
Build a missile silo. Then, when the missile is ready, sell the silo and immediately launch the missile. If done quickly enough, the
sale will have stopped and some troops will come out of the silo.

Tesla tanks:
Select a skirmish or multiplayer game. Then, choose to be France and have a Tech level of at least 7. Now before building a
radar jammer, hold [Shift] and click on the radar jammer icon.