Command & Conquer: Tiberian Sun

- Build 10 ORCA bombers, and then attack the enemy base. Simple as that. No matter what, they will not have enough anti air firepower to stop you from crippling their base.

- Blue tiberium is explosive. And deadly. Fill up a harvester full of blue tiberium, and park it next to the enemy construction yard. It should be armored enough to make it into the base, and the AI will constantly attack it. The resulting explosion (or perhaps you need two, don't remember) is guaranteed to destroy their construction yard.

- Especially online, pavement is your friend.