5. Gears Of War
https://www.youtube.com/watch?v=ccWrbGEFgI8 Considering the appeal of Gears largely remains in carving shapes into enemy chest cavities, the very first glimpse of it instilled a different mood altogether - one of sorrow, loss and isolation. You'll rarely find a sadder song that Gary Joules' Mad World in the first place, but when you factor in its a guy who's built like a tank like Marcus Fenix that's been left alone, it hammered home a pretty unique take on how to do a trailer for this genre. Add in the fact that it actually ends with him being killed after discovering a gigantic 'Corpser' creature, and the speculation on what we were in for was overwhelmingly positive.