Strafe:
Hell most "Tactical shooters" involve some sort of squad based combat which Half Life 2 has though the game is not built around such a mechanic. If I was to go with your assertion it would mean that Half Life 2 is a "Tactical shooter" because of the squad based game mechanic. My point with my analogy is that Thief, Splinter Cell, and Tenchu are all stealth based games irrespective of the fact that one of those games (Thief) does not have a mechanic for flattening oneself against a wall.
I fail to see what the problem is with a button that modifies the strafe keys so that they serve as lean left and lean right respectively sine that really is all a cover system really is in the first place, really no different from the strafe modifier in many FPS'.
It makes sense when you consider the fact that Call of Duty 4 has lean buttons in the PC version, as does FEAR, Crysis, and Far Cry. what you are suggesting would mean that all of these games I just listed are "Tactical shooters."And I'm pretty sure you've missed a couple of logic steps with your stealth game analogy because it doesn't make any sense.
Hell most "Tactical shooters" involve some sort of squad based combat which Half Life 2 has though the game is not built around such a mechanic. If I was to go with your assertion it would mean that Half Life 2 is a "Tactical shooter" because of the squad based game mechanic. My point with my analogy is that Thief, Splinter Cell, and Tenchu are all stealth based games irrespective of the fact that one of those games (Thief) does not have a mechanic for flattening oneself against a wall.
I fail to see what the problem is with a button that modifies the strafe keys so that they serve as lean left and lean right respectively sine that really is all a cover system really is in the first place, really no different from the strafe modifier in many FPS'.