10 Optional Bosses Who Kicked Your Ass In Seconds

Crawmerax The Invincible is certainly a namesake earned by this devilishly, infuriatingly difficult Raid boss from the original Borderlands' "The Secret Armory of General Knoxx" DLC pack.

As part of the aptly-named mission "You. Will. Die.," players will need to battle the armoured crab-worm-thing known as Crawmerax, such that even a well-stocked and otherwise able four-player party will have their hands full. If you're thinking of attempting to solo, don't.

Between the absurd range and debilitating power of its attacks - particularly its Monstrous Dive - and general lack of weaknesses, Crawmerax can make short work of unsuspecting and unprepared players in record time.

It often drops some of the rarest loot in the entire game, but for many it simply won't be worth the time investment necessary to put the big guy down.