Ethereal Device -> (PSI Armor -> buy PSI Armor, build Gollop Chamber).Hyperwave Communication -> build Hyperwave Relay.(Alien Nav Computer, UFO Power Source) -> New Fighter Craft -> (buy Firestorm, EMP Cannon -> buy EMP Cannon).Xeno-Biology -> (Arc Thrower, build Alien Containment) -> (capture alien -> interrogate alien, capture Outsider) -> Outsider Shard -> buy Skeleton Key.Note that credits are not tallied as they are generally in plentiful supply. The requirements for each mission are below along with recommended squad upgrades. Routing an XCOM speedrun comes down to gathering the materials and research neccesary to unlock the three story missions in the fastest possible way.
