We've posted the guides for each of Dark Souls' bosses in alphabetical order, as progression can differ from player to player. These videos are primarily for learning and understanding how to avoid the bosses attacks, where possible. Many bosses simply amount to “kill it until it's dead", but knowing when to clear out when an AoE attack is on the way is important.
Bed of Chaos
One of the Lord Demons, Bed of Chaos is a pretty straightforward fight. There are two glowing orbs in his chamber, one on each side of the room. Sprint over to each one (while avoiding / blocking his hand swipes), break through the branches, and attack the core. Once both orbs have been activated (this persists through death, as per the video), a chunk of the ground in front of the boss collapses. Do a running jump onto the large limb in the center of the hole, cut through the branches, and hit the little bastard. He dies after one hit.
Essentially Maneaters 2.0, this fight is ripped straight from Demon's Souls. Dodge the Gargoyles’ swipes and aerial attacks, and punish when they whiff. During the fight, a second Gargoyle will enter the fray. At this point, the pair gains fire-breathing attacks in addition to melee abilities.
First, kill those damned dogs. Once you can focus on the boss, dodge his attacks and get some hits in of your own. Additionally, there's a stairway leading up to a thin ledge in the back of the room. For a quick win, lure him below the ledge and do a plunging attack.
Step one: see a doctor. Step two: try not to get your face smashed by this fiery jerkwad's tentacles. Stay close to the ledge near his body, or he'll ceaselessly discharge fire all over the place. Sprint from side to side along the ledge to avoid his tentacle slams, and then get a few hits in. Rinse and repeat.
This monster's pretty straightforward. You only have a narrow ledge to fight on, so the first step is luring him onto your platform. He'll try to punch you with his Stretch Armstrong fists, but you can avoid his attacks by sprinting the length of the platform. Once he's in your turf, get under him, swing a few times, and back off.
We don't recommend locking on to him, as the camera can be sporadic when under his body. When he launches in the air, get away from him until he lands to avoid getting smashed. Finally, when he only has about one-third of his health left, he'll start dropping bombs from the ceiling when he jumps. Wait till those blow up before you rush in to attack.