Borderlands 2 - Decked Out

Have Purple-Rated Gear or better equipped in Every Lot - 25

You need;

4 Weapons

Relic

Shield

Grenade Mod

Class Mod

White - Common

Green - Uncommon

Blue - Rare

Purple - Epic

Orange - Legendary

Magenta - E-Tech

Pink - Seraph

Cyan - Pearlescent

Weapons and Shields are usually dropped towards the end of the campaign by enemies. You can also farm bosses for Relics, Grenade Mods and Class Mods, BNK-3R is good for these. You are also guaranteed a legendary drop from Terramorphous the Invincible.

Slayer of Terramorphous - Class Mod

Hide of Terramorphous - Shield

Blood of Terramorphous - Relic

Teeth of Terramorphous - Shotgun

Breath of Terramorphous - Grenade Mod

Pitchfork - Sniper Rifle

Axton, Salvador and Maya fighting Terramorphous the Invicinble