Let me introduce you to Tiberian Sun: Tech Level War. It's a mod with a new gameplay tweak, in which you have to build very expensive buildings - the tech centers - in order to level up and have superior buildings and structures and eventually win the battle. However, there are not useless units in the lower tiers.
Some tech buildings
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Description
I present to you these structures... guess what come out of them when you capture them... I'll leave it up to you to discover :)
The main idea with so many tech structures is making a big change in the match, in fact they can even make you win.