Most realistic game you ever played?

Bad rats.

Arma/Operation Flashpoint series.

Also chess.

Call of Duty. Mostly the post MW1.

Far Cry 3: Blood Dragon

Simulator Simulator 2014

ARMA III :3

Postal 2

Darude - Sandstorm

Don't remember the title. It was a Japanese game with tentacles. Never before have I felt so alive and in control.

Outlast on insane diff ....you death = start from begining xD

Metal Gear Solid 3

Pong

Life...

Crysis 3? :D

If autosimulator - Need For Speed: Shift 2 Unleashed.
If Action/Shooter - ArmA series.
It's my opinion.

Minesweeper

Insurgency and Red Orchestra. Can't think of any other FPS. Maybe Sniper Elite 2 for the ballistics.

Skyrim, duh

Crysis 3.

Beyond: Two Souls

Tibia, because you interact with people and se how motherfuckers they are.

Mountain

Surgeon Simulator 2013

Probably Far Cry 3.