Grimrock

Reed chest, Twigroot Tunnels, secret door in the room with the exit stairs (separate from the entrance stairs).

Reed boots, Forgotten River, buried chest 4 spaces north and 1 east of the entrance to The Cache.

Edit:
All the secret doors I've mentioned thus far have been opened by a nearby hidden switch.

Definitely hoping we see the sets modded so they have a global bonus. They are quite difficult to find all the pieces.

Not sure if anyone made this correction yet, too lazy to check all pages, but

Rogue Gloves - Forgotten River, SE, right after the Shrine of Entanglement there is a 5 tiles structure with a hidden button.

The structure is six tiles large and it's west-southwest, not southeast.

Archmages boots are in crystal mines. Little statue shooting opens/closes all those ground hatches. Underneath those ground hatches there is a spiked area. In the corner is little room that is opened by little button. Think the button was on wooded wall above spiked pit.

Meteor helm is close by just sitting on a shelf.

Mirror Chestplate is in The Lexiconary in a hidden area to the south. Location 254 on this map.

I can see the secret area with the archmage hat in the sewers (from the water area with the mosquitos and powerstone), but I can't figure out how to get into it.

got it.

there is a hidden button in the room with the spikes. go down into the spike pit where the ladder is. the button is on the wall opposite to the ladder, one square over.

ArchMage's Cap is in the east of Sewers.
You will find the hide button on the wall where you need to care about the spike.

Crystal Gauntlets is in the north of Sewers.
When you go to 5 little islands in specific order,the teleporter will open.(There is a map hint that,but i forgot where i got it.)

iwcuforever wrote:Crystal Gauntlets is in the north of Sewers.
When you go to 5 little islands in specific order,the teleporter will open.(There is a map hint that,but i forgot where i got it.)

the map hint is in the secret chest in the east sewer exit area. you have to push the buttons on the pillars in the right sequence. there's only 7, so it doesn't take long to figure out by trial and error.

Some infos to clear your list a bit:

- Embalmer Set has no gloves and no shield
- Archmage Set has no gloves and no shield
- Rogue Set has no shield
- Tribal Set has no gloves and no boots
- Reed Set has no shield
- Mirror Set has no shield; the buckler does not belong to it