You fucked up the tier list utterly.

GTA includes a bunch of peoples favorite games of all time.

Borderlands games were and are really fucking fun and set a lot of new ground for looting shooters.

Assassin’s creed also includes some great games, and a shitload of stuff from the games has been endlessly copied by other games.

Portal was one of the most imaginative and unique games ever released.

Halo set new high standards in a dozen categories, and includes classic installments

Seriously, even while gaming is subjective, your tier list is garbage.