Sen's Fortress - p. 1 | Walkthrough Dark Souls Guide
Last update: 11 May 2016
Sen's Fortress can be reached from a bonfire located above blacksmith Andrei chamber (Undead Parish). But in order to enter this dangerous place, you have to ring two bells - one of them is located in Undead Parish and the other in Blighttown/Quelaag's Domain. You should prepare many arrows for this location and increase the number of Estus Flask at nearby bonfire.
Once you get inside the fortress, jump to the right - there is an arrow trap with 3-4 arrows fired at you.
After a moment two enemies will come running towards you - lizards with shields and swords. Fight them in a standard way - block their blows and counterattack.
You'll get to the chamber with pendulum blades.
On the other side of the bridge with swinging blades, an enemy is lurking. You can lure him with an arrow to make him run and fall into the trap. If he passes, finish him.
Now run between swinging blades. At the end you'll have two run past two traps at once.
Stop only after crossing the bridge, because otherwise you'll be hit by lizard mage attack.
NOTE - at this time you can go to the special and optional part of this location. Notice, that under the first bridge with swinging blades you'll encounter Titanite Demon. You can jump down to him directly or first jump to an upper platform with two lizard mages. But at the bottom you have to deal with a mentioned demon fighting in a mud (Rusty ring is very useful now because it allows you to run in such conditions). In the bottom part of this location you'll find several Titanite Demons and some items.
A side exit next to the first Titanie Demon leads to a ladder. Use it to collect an item lying on the railing. At this place you can also reveal secret passage - it is the wall next to the item.
Behind the secret passage you'll find one more ladder up. Use it to get to the titan, who opened the gate to Sen's Fortress. You can kill him of course to obtain souls.
After this little shortcut for brave ones, we're back on main walkthrough. Go up the stairs to the upper bridge with more swinging blades.
On its other side you'll encounter a mage, who was shooting at you previously. Getting him is difficult because of blades. So it is best to kill him with a bow staying behind a column in front of the bridge.
In order to run past swinging blades, you have to jump over them - you can stop in the middle. In the chamber behind the bridge, you'll see a chest - quickly jump to the side, because there is another arrow trap and you can get hit by arrows. Once the trap is off, pick up the item.
In the next room you'll see few cages and a lizard sleeping under the wall. Do not attack him.
Go forwards, to the exit. Once you get close there, you should see a lizard and ... a large ball, which will fall on him from the side. Kill the monster if he is still alive. The ball returns to its place, unless you change her movement, so you will have to bypass it.