XCOM: Enemy Unknown - Video Game Keyboard Diagrams - PC/AT - US 104 Key (ANSI) - CIELCh Plain (Light) - HTML/SVG - GRID:193

Mouse Controls

 
Hold MMB & Move Mouse=Zoom camera
 
Scroll Wheel=Raise/lower battlefield level
 
RMB=Move soldier
 
LMB=Shoot at enemy, Activate device, Open door