Simply some lists of things worth finding in Undead Horde 2.
As will be obvious, I have decided not to use lots of screenshots in these lists. My hope is that the descriptions can be followed without creating something that will be bogged down with images. If anything is unclear, let me know in the comments how it could be improved. Thanks.
My suggestion for using this is to hit Control-F and search for what you need.
Runes
Thorns: Ruins of Bal’agor, bottom right-hand corner, follow-the-trail puzzle.
Vigor: Ruins of Bal’agor, kill kobold chief.
Isolation: Murder Cape, kill Helob (bottom right).
Brimstone: Elven Sanctuary, hidden chest just above south-eastern fountain of life.
Shielding: Crystal Mine, bottom right-hand corner.
Dysmantle: Frozen Creek, North-east corner.
Frost: from Frostbite Wilderness, kill the Beast of Carmague.
Dispel: Louhi’s Lair, by the Veinpoint portal.
Immolation: Orc Fortress, top wall, centre.
Haste: Skeleton Coast, top middle in a chest.
Vampire: Last Resort, Louhi’s room.
Power: Forgotten Sanctuary, bottom left there is a collapsible wall. Kill the troll.
Berserker: Elven Fortress, right-hand wall.
Flames: Mount North (secret area from Solarfall).
Devouring: Fields of Sorrow, top left.
Chilling: Antarctica, top left.
Command: Plunderer’s Retreat, footsteps far north, just above life fountain (dig).
Feeding: Smuggler’s Arch, SW corner, dig by footsteps in sand.
Bashing: Bootrock Ridge, top left corner, dig by footsteps.
Deflection: Port of Citadel, chest on left-hand side.
Antidote: Prison Dungeons, bottom left-hand corner, raise Runeberg’s 3 companions to open an area with 3 runes.
Thawing: same area.
Extinguish: same area.
Plague: Tower Keep, throw the 4 switches to access the treasury room key for room at bottom right.
Effigies
Skeleton Warrior: You start with this one.
Skeleton Archer: Early quest, you can’t miss it.
Zombie: Muddy Bog, in a chest.
Ghoul: Ruins of Bal’agor, kill kobold chief.
Corpse Candle: Forgotten Crypt, Pentagram room, raise from the tombs.
Banshee: Tomb of the Elven Queen, kill the queen.
Chicken: Misty Plateau, top left. You can’t miss the giant chicken.
Skeleton Mage: Small room at north of Elven Palace.
Bear: Serpent’s horn, Left-hand side, kill Ursa Major and Minor to get to the chest.
Dire Wolf: Frozen Creek, reassemble Ike.
Skeleton Bard: Frostbite Wilderness, kill Beast Master.
Scorpion: Scorpion lair, kill giant scorpion.
Mummy: Hidden Oasis, stand on the 4 pressure plates in order: By the big skeleton, by the oasis, by the small monument (you need chickens here) and then by the door.
Hierophant: Last Resort, get key from Janitor, chest on left of room unlocked.
Polar Bear: Solarfall, kill Bjorn.
Giant: Mountains of Might: Chest on right-hand side guarded by 2 giants.
Wraith: Heart of Winter, frozen chest in Ravendark’s chamber.
Shaman: Plunderer’s Retreat: Collect the 3 Chester clues and dig up his chest.
Lich: Sandstorm Valley: 3 levers – passage from centre of western wall leads north then east to first; head east from that passage under a giant arch then northeast on another passage to the second; head north east from the Bootrock Ridge exit to a third passage with the last switch; follow the short passage north from the eastern life fountain to a chest with a map, go to the map point and dig.
Death Knight: Paladin’s Mantuary, in the locked chest in the treasury (key from killing boss of that level).
Secrets
Scavengers’ Bog: Destroy the 3 totems around the area to unlock a bridge in the centre of the area. Chest with Fire Axe in it.
Dark Woods: Half-buried chest to the left of the two towers.
Muddy Bog: Behind the 1-2-3 “puzzle” in the North-East corner.
Ruins of Bal’agor: Left hand side, above a destroyable wall (grey on mini-map)
Ruins of Bal’agor: Bottom right-hand corner, follow-the-trail puzzle, Rune of Thorns.
Murder Cape: Chest at far right over a totem bridge.
Murder Cape: Chest between 2 totem bridges, just South of centre of map.
Murder Cape: Helob’s chest, bottom right-hand corner.
Forgotten Crypt: Pentagram room, raise from the tombs, Corpse Candle effigy.
Misty Plateau: Top right-hand corner, chest above a statue.
Crystal Mine: Secret room on Southern corridor. Possibly triggered by lever at top right.
Elven Sanctuary: Behind collapsible wall by south-eastern fountain of life.
Elven Sanctuary: Behind that same wall, half-buried chest just above the obvious one.
Elven Sanctuary: Hidden chest just above that fountain. (Brimstone Rune)
Elven Sanctuary: Half-buried chest south of the group of buildings.
Elven Sanctuary: Right-hand side collapsible wall.
Elven Sanctuary: Follow the compound outside wall round to the north-east point. (Elf Reaper)
Tomb of the Elven Queen: Activate both pressure-plates at once, centre of the screen.
Tomb of the Elven Queen: Chest in the rubble, west of the queen’s resting place.
Tomb of the Elven Queen: Activate the switches in the bottom-right hand corner.
Tomb of the Elven Queen: Kill the queen (Banshee effigy).
Drifting Woods: Area X after killing the ranger you have the switch to open this area.
Drifting Woods: Only accessible after getting power to lift the barrier.
Serpent’s Horn: Frozen chest by entrance, use stick of fire to melt the ice.
Frostbite Wilderness: Melt ice by Louhi’s Lair entrance (Chicken Amulet).
Louhi’s Lair: Right hand wall, you can see chest in the ice.
Louhi’s Lair: Just above the witch trainee, harder to spot but again, melt the ice.
Louhi’s Lair: To the left of the noble soul pedestal.
Skeleton Coast: Left-hand side, turn left after the big archway.
Skeleton Coast: Top left, at the footprints in the sand (need shovel).
Hidden Oasis: Half-buried chest by the south-east entrance (Orc Reaper).
Hidden Oasis: Stand on the 4 pressure plates in order: By the big skeleton, by the oasis, by the small monument (you need chickens here) and then by the door (Mummy effigy).
Orc Fortress: Follow the bottom edge till you get to the footprints then dig (need shovel).
Last Resort: Rupert’s room, bottom left.
Last Resort: Janitor’s hallway, top right of this room there is a buried chest.
Last Resort: Caretaker’s room, to the right of the Veinpoint portal.
Forgotten Sanctuary: Collapsible wall, bottom left (Rune of Power).
Forgotten Sanctuary: Noble soul jar puzzle – have units on all pressure plates at once.
Elven Fortress: Light the 4 pressure plates at the top of the map (Fire Amulet).
Elven Fortress: Right-hand side of bottom enclosure, chest (Berserker Rune).
Solarfall: Cave entrance to Mount North.
Solarfall: Second cave entrance to Mount North, on the left-hand side.
Mount North: Chest encased in ice.
Mountains of Might: Left-hand side, cross the ice floes to kill the last bear.
Heart of Winter: Frozen chest in Ravendark’s chamber (Wraith effigy).
Plunderer’s Retreat: Dig at footsteps far north, just above life fountain (Rune of Command).
Plunderer’s Retreat: Bottom right-hand corner, chest against wall.
Smuggler’s Arch: Just east of the southernmost life fountain, swirl that transports you.
Smuggler’s Arch: Western wall, in the shade is a chest.
Smuggler’s Arch: South-west corner by footsteps, dig (Rune of Feeding).
Smuggler’s Arch: South-west of the northernmost life fountain, dig (Draugr Sword).
Sandstorm Valley: Dig at footsteps to east of northern life fountain (Staff of Necromancy).
Sandstorm Valley: 3 levers – passage from centre of western wall leads north then east to first; head east from that passage under a giant arch then northeast on another passage to the second; head north east from the Bootrock Ridge exit to a third passage with the last switch; follow the short passage from the eastern life fountain to a chest with a map, go to the map point and dig (Lich effigy).
Bootrock Ridge: Head South from the Veinpoint Portal and there is a passage on your left.
Bootrock Ridge: Keep heading South and there is a pile of boxes on the right with a chest under them.
Bootrock Ridge: Aim for the bottom right-hand corner then just on the left is a tiny passage with a half-buried chest.
Bootrock Ridge: Head west from there to some footsteps in the sand, dig.
Bootrock Ridge: Keep heading west and there are more footsteps at the bottom left corner.
Bootrock Ridge: Top left corner, more footsteps, dig for a Rune of Bashing.
Pirate’s Hideaway: Southeast corner, dig at footsteps.
Pirate’s Hideaway: Northeast corner, dig at footsteps.
Pirate’s Hideaway: Northwest corner, after throwing 3 switches in area (Ula Mula).
The Port of Citadel: Chest at bottom right-hand side.
The Port of Citadel: Cross the little bridge and round to the right is a short passage with a chest.
The Port of Citadel: Chest just south of the orc warband on the left.
Outskirts: Just to the right of the entrance from Port of Citadel is a gold chest, not very secret.
Outskirts: To the left of that entrance is a route south round the wall to a chest.
Outskirts: Right-hand side of the river is a passage leading to a chest.
Outskirts: Top of the area is a Noble Soul Jar and a chest, use chickens from the right-hand side to press a pressure plate.
Outskirts: Enter from Old Town, right hand side, demolishable wall has a chest at bottom.
Outskirts: Just left of there, attack the winch device to trigger the ship to be boarded.
Outskirts: 2 chests on that ship are each secrets (Leeroy’s axe).
Outskirts: As above.
Paladin’s Mantuary: Top left-hand corner is a chest.
Prison Dungeons: First tiny room on the south wall is a hidden chest.
Prison Dungeons: Bottom left-hand corner, raise Runeberg’s 3 companions to open an area with 3 runes: Antidote, Thawing and Extinguish.
Prison Dungeons: North of the Veinpoint Portal, just past the water on the left.
Prison Dungeons: Top right-hand cell has a hidden chest.
Old Town: Directly west from the northern life fountain, there is a gate with a chest on the other side.
Old Town: Northeast corner, south of the water, hidden chest.
Old Town: South of the water against a wall, chest.
Old Town: Southwest corner, by exit to Eastguard, demolishable wall.
Old Town: Just north of the veinpoint, tucked in by a wall is a hidden chest.
Old Town: Northwest corner, chest against the wall on the right.
Eastguard: Northwest corner, follow the west wall down to a chest.
Eastguard: Southeast corner, gold chest just past the gravestones.
Eastguard: Demolishable wall just above Tower Keep entrance.
Eastguard: Bottom left-hand corner, deep into the settlement, gold chest.
Arachness’ Cave: Southeast corner.
Westguard: Centre of south edge of area, collapsible wall.
Westguard: Middle of map is a moat round some chests, attack the 4 winches round the edge.
Westguard: Right-hand side, just above the Tower Keep exit.
Tower Keep: Top right, above Switch I.
Knightspire: Half-buried chest by northwest group of buildings.
Knightspire: Collapsible wall east of life fountain.
Knightspire: Northeast corner, to the right of a statue and behind a building.
Knightspire: Just inside the central group of buildings guarding the Cathedral entrance.
Knightspire: To the right of the cathedral entrance.
Cathedral: Bottom left of west wing.
Cathedral: Chest at northeast corner of final battle room.
Cathedral: Just to the right of entrance from Knightspire.
Cathedral: East wing, just north of veinpoint portal is a secret room, destroy the bookcase to access it.