| Hint | Unit Name |
| Building; Produces non-vehicle units | |
| Building; Produces vehicle units | |
| Building; Produces Air Units | |
| Building; Unlocks upgrades for ground units | |
| Building; Allows you to produce more units | |
| Building; Produces vespine gas | |
| Building; Houses/ Protects Units | |
| Building; Detects Cloaked Units Attacks Air | |
| Building; Detects Distant Enemies | |
| Building; Produces Nukes | |
| Building; Unlocks upgrades for Vehicular Units | |
| Building; Unlocks Battlecruiser Upgrades | |
| Add-on; Allows production of 2 units simultaneously | |
| Add-on; Unlocks advance units | |