most replayed game?

Mafia City of lost heaven, Dishonored, Max Payne, Diablo, Dont starve etc... there is many games i like to play :D And one Honorable Mention because it is MP - First original "Half life" multiplayer.

Skyrim and the Borderlands series.

Bastion, 3 times already

Depends on what you mean by replay. I've started over on Minecraft more times than I can count.

I've also honestly played through Fortix and Fortix 2 a couple of times.
Other than that, most sandbox/freeroam games are replayable of sorts, as in keep playing differently without even needing to restart your save file. Mass Effect, Walking Dead and games where your choices should be great for replay as well.

XCOM Long War