"Tactical" games are a fairly recent phenomena, games where teamwork, planning, and stealth are more important than a quick trigger finger. Recent games like "Rainbow Six" really gave birth to this whole phenomena, with more tactical titles scheduled to release all the time...
TACTICAL PLANET PIC OF THE DAY
This is a screen taken in RS using Lloyd's Weapon Mod 4.02a. I love this gun, and the screen shows why :)