: Recover weapon fragments, alien alloys, and elerium from mission sites.
: Capturing live aliens with an Arc Thrower and interrogating them provides "Research Credits," which significantly speed up related technology paths. 2. Engineering and Manufacturing XCOM Enemy Unknown
: Use your Science Labs to study these materials. For instance, researching Beam Weapons is required before you can manufacture Laser Rifles. : Recover weapon fragments, alien alloys, and elerium