Is there any guide about what item do what
and any explanation about the mechanics for Dungeon Sanctuary?
I fought human enemies and manage to strip them but can't seem to do more than that
Does those crying enemies have any other use beside stripping them for items?
To answer your first question: No
There is no guide as the game is still in development! You only get the tutorial at the beginning which shows you just the simple basics of the game.
It's learning by doing to see what each potion does. You are able to buy some potions from boarman and get shown what these are called like "fire potion" or "health potion".
I made a 100% save for an older version
HERE. This should also work for the latest version if you just want to try out all kinds of different potions.
For your second question: Yes and No
At the moment this is as far as the player can interract with them. In the future the player should be able to take the stripped
adventurer as hostages. Once they are stripped naked they will have the status "captured". By interracting with certain NPCs the player can gain reputation and XP if he gives the "captured adventurer" to one of them.