A conduct is a voluntary challenge that players take on to make the game more difficult or more interesting. TMW does not track your conducts.

It is not possible to complete keep all conducts in one game.

Many of these quests are trivial at high levels; these are intended to be kept from the creation of the character, although in some cases doing just a quest is meaningful, e.g. "Complete the Yeti Quest as a weaponless nudist".

conduct	meaning	notes
pacifist	never attack a monster	Unlike nethack, which allows attacking as long as you don't make the killing blow (this is meaningless in a multiplayer game). Gain experience from quests and by healing; party exp sharing shouldn't count. Impossible without another character.
weaponless	never wield a weapon or use a offensive magic (except #upmarmu)	Relatively simple; focus brawling at level 35.
nudist	never wear armor to keep you alive. #betsanc okay	very challenging, as raising vit is less effective and costs points, but favors archers and mages. Starting the speed quest requires wearing something, but that's just for a dialog.
shareless	never give or receive an item from another character (including your own through storage)	Pretty easy; often broken only because people aren't thinking of conducts.
partyless	never join a party or gain the xp bonus for attacking a monster with another player.	Hard to guaranteed a monster hasn't been attacked by someone else.
storageless	never store or retrieve anything	Having to carry everything you need around will make stuff pretty heavy, and make the speed quest pretty hard.
moneyless	never buy an item from an NPC, including manufacturing dialogs	Prohibits some armors, and makes archery unfeasible (but possible by transmuting logs into arrows).
foodless	never regain HP by eating something	Going without healing items will make certain quests difficult; a high vit and sitting is required.
healless	never get healed by magic	Difficult to guarantee players won't heal you without asking. A suggested solution: if anybody heals you, you must stop attacking and commit suicide (or maybe walk to the Soul Menhir).