Use the "Q" hotkey to move and fire at the same time. You can also give multiple move commands with the "Q" hotkey.
Building on low power is %50 slower.
A full Harvester of green tiberium is worth $750, a Harvester of blue tiberium $1120.
After technology is acquired, you can sell it. You don't have to keep it in order to keep its technology. Although if the structure that gained its technology is destroyed, both the structure and the tech structure need to be rebuilt.
A Disruptor does more damage when shooting diagonally through buildings. If angled correctly, it can one-shot Refineries and War Factories.
By using ALT, you can issue a force move command. When paired with ground vehicles, you can use a force move command to squish infantry.
Building a Harvester costs $1400. Building a Refinery and selling it afterwards costs only $1000. Depending on what you're doing, building a Refinery instead is generally more efficient.
After giving your Carryall the command to land on a unit, you can order that unit to fire at a target, so it will keep firing until the Carryall lands. It will also start shooting right after being released again.
Orca Bombers tend to waste a lot of bombs when being told to attack a building. You can "power bomb" by flying them close to the building first, and then attacking it.
Use CTRL to force fire. You can use force fire to extend the range of Disc Throwers.
Select a production building and hold ALT to create a rally point.
3 Light Infantry can kill a single Light Infantry walking by.
If you want to protect your base from Disruptor drops with RPGs, place them a couple of cells apart so that they cover each others blind spots.
5 Banshees can one shot a Disruptor.
10 Banshees can destroy a main building (Construction Yard/War Factory/Refinery) in one shot.
3 Engineers can steal an opponents building when multi-engineer is on (EMPs cannot be captured).
Using G while having a group of units select puts them into Guard mode. Units in Guard mode will automatically seek targets that are nearby.
You can sell vehicles by placing them onto your, or your an ally's, Service Depot. Once they're on the Service Depot, sell them like you would normally a structure, except this time wait for the green dollar sign to show before selling.
Place a building underneathe a landing enemy Carryall to temporarily prevent it from landing.
Harvesters full of blue tiberium can be used as a "harv bomb". Harv Bombs deal enough damage to destroy a War Factory or a Refinery.
Control your Harvesters! Harvest the tiberium closest to your Refinery. If available, always harvest blue tiberium if nearby.
Devil's Tongues deal more damage to buildings the closer they are.
Harvesting tiberium closest to the tiberium tree will allow the tiberium field to last slightly longer.
Using G while having a group of units select puts them into Guard mode. Units in Guard mode will automatically seek targets that are nearby.
A Ghost can kill a Carryall in one shot if you're able to shoot it right as it lands.
To protect yourself from a Nod Engineer rush, you can put infantry around a building, use static defense, or use a waypointed bomber defense.
Waypoints are very useful in Tiberian Sun. They can be used to Engineer buildings and have air units automatically attack units.
You can automatically reload your aircraft by having a waypoint loop on a Helipad.
It takes 7 shots from a Titan to kill a Disruptor.
Subterannean units can surface directly under an Engineer to kill them. Use a force move command to do so (ALT).
3 Orca Bombers can take out a Refinery if you attack it diagonally.
You can hijack an enemy's Harvester full of blue tiberium and use it to harv bomb your opponent. Try to steal a full one that is already heading back to their Refinery.
You can draw out your enemy's defensive units by attacking their Harvesters, which will leave their base less heavily guarded and ripe for attack.
If you destroy a bridge with units on it, the units will fall into the water and be destroyed.
The most effective way to bomb (GDI bomber) a bunch of Titans is to wait until the Titans get to your base and group up in order to attack you. When the titans group up, bomb them from behind… towards your base. Bombing in this way will maximize the number of bombs that hit the Titans.
You can't repair an Orca Bomer on an ally's Service Depot. 