Starting with level 6, you receive the Cruise Missile Silo.

Production Cruiser - Refinery Mode- allows you to use Production Cruisers as resource collection point.

Compulsory at the very beginning of the game.

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Sandskimmer Raiding- increases max speed of Sandskimmers by 33%.

It is a good idea to buy it, not necessarily at the very beginning of the game.

Sandskimmer Damage- each tier increases Sandskimmers' firepower by 2.

Homeworld: Deserts of Kharak - Tech Tree - Gaalsien

Sandskimmer Armor- each tier increases Sandskimmers' armor by 2.

If you have such vehicles, you’re able to try out this upgrade.

Still, this is not recommended if you are short of supplies.

Homeworld: Deserts of Kharak - Tech Tree - Gaalsien

Missile Ship - Radar Guided Missiles- improves accuracy of attack against aircraft.

This one is a cheap upgrade and you’ve got the option to afford it.

Armored Unit Defenses- increases armor and, at higher tiers, health of Assault Ships and Missile Ships.

Homeworld: Deserts of Kharak - Tech Tree - Gaalsien

If there are many Assault Ships in your army, this one is compulsory.

Assault Railgun - Dart Maneuver- provides you with an option to speed the movement speed of units.

Not too useful for this punch in of units.

Homeworld: Deserts of Kharak - Tech Tree - Gaalsien

Railgun Armor- they increase armor and health points in Assault Railguns and Heavy Railguns.

It is a good idea to buy it soon after you gain access to these vehicles.

You should give buying this upgrade a consideration.

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If you use many of such units, they can slow down the entire army.

Heavy Railgun - EMPRounds- provides shots with EMP effect and paralyzes the unit it hits.

Obtain this upgrade to make the most of your Heavy Railguns.

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Siege Cruiser - Range Upgrade- increases range of attack of all weapons that Siege Cruiser is armed with.

You should buy this upgrade right after you gain access to these units.

Honorguard Cruiser - Anti-Air- unlocks the ability to shoot down airborne units.

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This upgrade is costly and inarguably, it is better to invest into additional Missile Ships.

Interceptor - Afterburner- increases maximum speed of Interceptors by 60%.

You should absolutely buy it.

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Bomber - Ammo Capacity- increases bomb capacity of bombers from 2 to 4 per unit.

Aircraft - Recharge Upgrade- decreases cooldown of plane attack by 50%.

If you use aircraft, you should buy this upgrade, not necessarily at the beginning of the game.

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Homeworld: Deserts of Kharak