On the final level of the GDI campaign, you'll be able to use Boyle's Liquid Tiberium Bomb. However, the option to use it or not will give a different ending.
Unlockable How to Unlock The "Bad" Ending Use Boyle's Liquid Tiberium Bomb The "Good" Ending Don't use Boyle's Liquid Tiberium Bomb
Play as NOD in Skirmish mode of demo
At the skirmish options menu, hold N and click you army to make NOD as selectable option.
To switch back, hold G and click your army to make GDI selectable again.
This works with the computer army as well.
Contributed By: The_Approved.
Play as the Scrin
To play the secret Scrin campaign, finish both the GDI and Nod campaigns. This will unlock the Scrin campaign of four missions.
Contributed By: Grawl.
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