¿FPS? I think i need to talk about this
There is no surprise that FPS games are one of the most distributed all over the world but the roots of the shooters are on 2D. You may feel offended for what i just said, so lets take an much more mediocre example that actually went very well (if you ask me)
Guns, gore and cannoli, a videogame about american/italian mafia in 2D that emphasized the action of NOT using a mouse and playing with your keyboard. The game was a success and because of that, they made a sequel also in 2D but this time you had to use the mouse to point the gun.
What i'm trying to say is that WE (not only me, WE as in multiple) will not feel like the games is getting worse because of it being in 2D and not in 3D. Super Mario Bros is in 2D and yet i know no one that hates that videogame.
Obviously, you are not supossed to take this as a "make the game in 2D or else" but rather as a "it ain't bad that it was on 2D". Wether you do what you do with your wonderful videogame is up to you.
Semper Fi Rozwiac (Hope i didn't mispell it)
(please be aware that my local language is spanish and altough i am very fluid in english, gramatical errors and/or mispells are expectable)