What's the greatest single-player FPS ever made

What's the greatest single-player FPS ever made.

Attached: Bunch of Guns.jpg (2000x1000, 762.65K)

Perfect Dark

1. Call of Duty 4
2. Half-Life 2
3. DOOM Eternal
4. Counter Strike (any iteration)
5. Battlefield 2

Came here to post this

Far cry 3

doom

SoF 2

quake 1 or duke 3d

Black

Dead Space