Metal Gear Solid V’s marking system is not comparable to Splinter Cell’s Mark & Execute Mode, Kojima Productions insists.
In the latest episode of the official podcast, Kojima Productions addressed some of the concerns surrounding this new gameplay mechanic.
The reason the studio implemented the marking system is that they no longer have the Soliton Radar System. You could see enemies were around the corner. Now you can use the marking system for that. This means you have to plan your infiltration. Using binoculars from a distance to scope out the area and mark enemies.
“Again, this is completely optional, and you don’t have to mark enemies if you don’t want to.” host Sean Eyestone clarified. “Another thing that we want to point out is that it’s very different from the way marking is used in other games.” According to Eyestone, it’s not similar to Splinter Cell. The system won’t be used to mark and execute enemies, like in that game. It’s only used for gathering intel and planning your infiltration strategy. Marking system and reflex mode are two separate modes, and they are not related. One helps to prevent you from getting spotted, the other helps you if you are spotted.