Systems: Fire modes, Ammo types, and Magazines

[EASyEightyEight]

They won't have to change jack between either. Think about the number of keys you use already.

1. Fire
2. Reload
3. Fire mode
4. Ammo type
5. Use
6. Jump
7. Crouch
8. Zoom/ADS
9. Weapon 1
10. 2
11. 3
12. and 4
13. Knife
14. Menu (logout, options, etc.)
15. hrm... I ran out of what a grunt uses in PS1.

And I can map each and every one of those to a dual-shock and still have a stick press and select to use. They could probably figure out how to get PS2 to work with the MOVE if they even so chose.

Vehicle play demands far less keys.

Further, I know the PS3 can utilize a mouse and keyboard, most games on the PS3 just aren't programmed to use a mouse and keyboard. The Playstation 2 allowed mouse and keyboard even (that version of Half-life was the best.) I don't think much need be done for the Playstation 4 port except graphics control and coding it to run efficiently on the system.