Almost every kind of unit in Metal Knights has a use (or uses) for which it is best suited. If you don't use these units when and as they are best used, then you will be wasting money and may lose because of it. Examples of this wastage of money include using Alpha Warriors to expand and capture unprotected enemy cities and using Artillery in the open (where they are quickly destroyed because their defensive scores are so low).
The descriptions of the units are on three separate pages. However, they are not organised into the standard divisions of Ground Units, Naval Units and Air Units. The reason that I have done this was to show with greater clarity the differences between units of similar functions (and to highlight those functions). Here is how the units are categorized with links to each page and category.
| Expansion Units (Page 1) | Specialist Units (Page 2) | Standard Combat Units (Page 3) |
|---|---|---|
| Infantry | Low Mobility/Defensive | The Battle Tanks |
| Transportation | Anti-Air | Naval Firepower |
| Resourcing | Long Range | Air Superiority |
| The Sneaks |
The abilities section of each description covers Ground Attack Value, Defence, Air Attack Value, Range, Moves and Cost (to build). The abilities are included to give the simplest comparison between the various units of each type and help to explain the comments. The comments (of course) are there to explain in fine detail the best uses of each unit. Finally, some units fall under more than one category and so their abilities in each realm are discussed in those places (with links to their other listings). Below is a listing of all the units and links to each of their entries.
| Air Freedom | Anti-Air | Flag | Low Mobility/Defensive | Predator | Air Superiority |
| Alpha Warrior | Infantry | Furtif | The Sneaks Air Superiority |
Scorpion | The Battle Tanks |
| Apache | Air Superiority | Scout | Naval Firepower | ||
| Artillery | Long Range | Grizzli | The Battle Tanks | Scud | Long Range |
| Bulldozer | Resourcing | Hawkeye | Anti-Air | Shark | Resourcing The Sneaks Naval Firepower |
| Captain | Naval Firepower | Hercules | Transportation | ||
| Cargo | Transportation | M-31 | The Battle Tanks | ||
| Commando | Infantry The Sneaks |
Metal Knight | The Battle Tanks | Shooter | Long Range |
| Nuclear | Long Range | Soldier | Infantry | ||
| Destroyer | Naval Firepower | Panther | Infantry | Striker | Low Mobility/Defensive Long Range |
| Eagle | Air Superiority | Patriot | Low Mobility/Defensive Long Range |
||
| Elf | The Battle Tanks | Tiger | Long Range | ||
| Falcon | Anti-Air Air Superiority |
Porcupine | Low Mobility/Defensive The Sneaks |
Transport | Transportation |
| Truck | Resourcing |