The second level starts showing what going through Grimrock is really about. It will only get more difficult from now on, the enemies tougher, puzzles more complex and resources more rare. But don't worry, as more powerful items and higher levels will follow. The rest is described in this guide.
Right after entering this level you will note a room in the north. If you haven't jumped down one of the hatches during the previous level, now is the chance to collect the items found here: the Peasant's cap and a Rock.
After the fight in the corridor you will reach a cell, inside which you will find Dublet (armour), Dagger and a piece of Mole Jerky - yummy ;]
Before opening the gate leading to this room, make sure you're ready for a quite difficult fight. Inside you will come across a new type of enemy, a smaller variation of the Herder, which however is more dangerous than its larger type. Small Herders spit poison, so it's best to attract them one at a time and keep at distance, avoiding their attacks if only possible.
On the floor in this room you can find a number of items: a Machete, Compass and the Iron Key to (4).
Open the gate with the key found in the previous point.
In the corner of this room you can find a secret. In order to open it, you need to put the torch in the marked handle. Inside the newly unlocked room you will find the Iron Basinet. It's a heavy armour, equipping which requires the skill of using such items.
By following this corridor you will reach a locked cell on the left side, inside which you can find some items, though the entrance to which is hidden inside the next room. You can however reach some of them through the grates. The first item is the Sandmole Hide Vest and right beneath it there's a key to the door at the end of the corridor.
After entering the room, turn into the dead corridor on the left (you can find a Rock inside). On the marked wall you will find a hidden button which opens access to a cell with Poison Arrows.
In order to get out of this room, you need to place an item of choice on the plates found on both sides of the door.
Inside the corridor leading to this cell you will encounter yet another enemy - the Crowern.
In order to reach the cell, you will need to use a little trick. The hint on the wall suggests that you need to throw away your weapon before entering. You however don't need to get rid of any of your party member's weapon. Just place any weapon you aren't using anymore in the alcove beside the grate. After killing the Snails found inside the cell, collect the Grim Cap and Iron Key to one of the Doors in (15).
Inside the "no weapon" room there's also a secret which you can reach after pressing a stone on the wall in the corner. Inside you can find the Pointy Shoes.
Follow the corridor to a teleport behind grates. Open it and use the teleport to reach point (12).
Can be found in an isolated part of the level with nothing but locked cells. Inside one of them there's a Skeleton and a Sack in another. On the left wall, between your targets, there are two buttons which activate teleports inside the cells. Teleports move items between adjoining cells, in a clockwise pattern. In order to get the Sack and afterwards the Skeleton out of the cells, you need to alternate between pressing the buttons until the content of the cells is moved to the nook at the end of the corridor. Inside the Sack that you've teleported you can find Bread, a Leather Cap and the second Iron Key to the Doors at (15). The Sack itself can also be used as place to store your items, e.g. alchemy ingredients or scrolls.
This teleport takes you back to the main part of the underground. In case you have any difficulties with the Skeleton you let out of the cell, you can use it to quickly evacuate and recover.
Inside this seemingly empty chamber you will encounter a trap, though a worthwhile one. In the middle of the room there's a pressure plate - as you enter it, the door behind you will lock and Skeletons will start coming from the walls. The first to open will be the wall opposite to the door (pointed with the arrow). Approach it at once and get rid of the Skeleton in the nook as soon as possible. With some luck, you will be able to kill it before its friends come to help. Immediately hide in this nook, so that the other two enemies cannot push you to a corner and attack from two sides. This way you will be able to eliminate them one at a time. After getting rid of them, search the nooks for the Tattered Cloak, Bone Amulet (important later on) and the Scroll of Ice Shards. In order to get out of this room, pull all three levers inside the nooks.
Having both Iron Keys, go through the two Doors standing in your way.
Inside this room you will come across the enjoyable Crystal of Life and a door, for which you need two more keys. In order to obtain them, you will have to explore both corridors leading east and west of the Crystal.
After defeating the Crowerns in the western tunnels, look for the rectangular button on the wall beside the torch in the south-west corner. It will open the hidden room in the north-west, inside which you can find a button which opens the last room in the north. One more Crowern will fly out of it. In the last room you will find one of the needed Brass Keys and a Throwing Knife.
Inside the eastern corridor you will come across a teleport which moves you back one square, preventing you from moving onwards. In order to get pass it, you need to find a button hidden one the opposite wall and head backwards (!) right after pressing it, towards the temporarily deactivated portal. The deactivation time is so short that you don't have time to turn around.
In order to get to the other side of the trapdoor, just throw any item you want onto the pressure plate on the other side. If you fall into the hole, you will find a single Grim Cap and a teleport leading back.
At the end of the corridor you will meet Crowern and find the second Brass Key to the gate from point 16, a Hand Axe and a Cave Nettle.
Having both Brass Keys, you can open the gate leading to the portal.
Inside this room you can find an alcove with the Scroll of Poison Bolt.
In order to open the gate, find the button hidden on the southern wall.
On your way deeper into the underground you will encounter a door which can be opened with the button beside. Look out however, as at the same the wall right behind you will open as well and Herders will come out of the room there (including one Small). If you want to avoid getting pinned down, back out following the corridor you used to get here right after pressing the button and eliminate the enemies one at a time.
Inside the room from which the Herders came you will find a Sling which throws Rocks which much higher force and you should have some of them with you.
In this room you will find a Brass Key and a lever which opens a secret room (27), from which more Herders will come.
After eliminating the enemies who came out of this room, search it to find a Phalanx Helmet, Leather Pants, Tar Bead and a Skull. Skulls are unique items which count for the end statistics. Additionally it's an item which enhanced the damage dealt by minotaurs with Head Hunter status.
Inside the hall beside the last secret you will another one, though the button which opens the room can be found beside the pillar nearby point (29). Inside the room there's a Treasure (one of seven), in the form of the Golden Chalice.
Inside this corridor (beside a button used for the secret above), you will find a Grim Cap, Cave Nettle and Nomad Boots. Apart from that you will also find a lock on which you can use the Brass Key which you've found before.
Here you can find the lever which opens the passage to the starting area of the tunnel.
This door can be opened by standing on the pressure plate for a bit. After opening it, you will be attacked by a Skeleton.
After reaching this large room, you will be attacked by a group of 4 Skeleton Warriors.
The group of enemies acts just like your team, they move together but deal and receive damage separately. Thanks to that, bombs and some AoE spells work well against them. At this point you should really consider training fighting 2x2 squares, so that you're ready for further fights with such groups.
At this spot you will find the second Iron Door in Legend of Grimrock. In order to open them, you need to wait a dozen seconds or so while standing on the pressure plate beside the sculpture on the wall. After the door opens, a Skeleton group will come out, so back out to the main chamber to have room for dodging.
Behind the Iron Door you will find three Fire Bombs (which by the way are great against such groups of enemies) and complete another secret.
Inside the same room you can find yet another secret. Just look for the button in the wall opposite to the entrance to open a short corridor, inside which there's a single Skeleton and a Wooden Box. Boxes (just like Sacks) increase the capacity of your inventory, but weight a bit themselves. Inside this Box you will find a Healing Potion, Leather Brigandine and the Scroll of Poison Shield.
It's the end of this level. Beside the stairs you will find a Sack with the only Mortar and Pestle in the whole game (essential in alchemy), together with some ingredients and a Scroll. In order to open the grate blocking the stairs, just pull the torch out from the handle.
Stairs to level 1.
Stairs to level 3.