Command & Conquer 3: Tiberium Wars Cheats & Tips

Send a engineer or saboteur and capture your enemies' construction yard. You will be able to build your enemies' buildings and units. It is also possible for an ion cannon and nuclear missle to operate at the same time.

To play the Scrin campaign, finish both the GDI and Nod campaigns. This will unlock the Scrin campaign.

There is a way to get your mammoth tanks, or any unit for that matter to, at least temporarily detect stealth.
First, you must have an airfield, with at least 1 Orca.
Next, you need the sensor pod upgrade.
Finally, just target the units you want to detect stealth, and drop a pod on em.

The pod will detect stealth, and your unit will react. Simple as that.