There is an emphasis on artillery: although many direct- and close-combat weapons and anti-air weapons can be researched and deployed, artillery is a staple of assault on enemy bases and outposts. While the technology tree is clearly defined and consistent, it never appears in-game and, therefore, the player can be left guessing as to what technology is next in the tree. Technology can be acquired by gathering artifacts left behind by certain destroyed enemy structures or units. Researching is composed of largely small and incremental advancements over existing weapons, armor, and chassis types.