Extra footage used in this video:  

Gears Tactics - All Cutscenes - 1080 HD No Commentary - https://www.youtube.com/watch?v=Ilwj72bL56Y&t=377s 

PS3 Longplay [041] Xcom Enemy Unknown (part 01 of 10) - https://www.youtube.com/watch?v=K0cwxE13-kI&t=2652s