Research in Age of Wonders: Planetfall is divided into two categories: Military research and Society research. Military research is divided into three subcategories: Faction technology, Weapons technology and Secret technology. Society research is divided into three subcategories: Doctrine technology, Economy technology and Operations technology.
At the start of the game each player selects one of the secret technologies of the Star Union. These are fields of experimental or forbidden research that were hidden from the general population. Secret Technologies contain additional units, mods and especially operations. Each Secret Technology has its own doomsday weapon, which reflects the ultimate goal of that technology. Doomsday Weapons are powerful, planetary scale weapons which the player can use to gain a huge advantage and eventually win outright.