I don't know why people are complaining about the lack of split screen. The days of FPS split screen are coming to an end and for good reason. What you see (or can't see) impacts your game experience.
Split screen...
- cuts you viewable area in half (or fourths)
- distorts the screen ratio
- decreases screen resolution
- decreases frame rate
People should not be upset that their experience is being protected.
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My mate brings his console and TV to my house, we play sat next to each other, in the same room. Split screen isn't needed.