mitchiemasha wrote:I like it but it posses questions. "if no enemies are in sight", who's sight, his or theirs? Shouldn't it be theirs?
How about. 'May use stealth but must roll one less move die. If you are in or enter into a monsters LoS roll a Cd6. If a black shield is rolled you are discovered, otherwise you remain undetected.'
It does have the issue of all monsters being equally avoidable. Where as some should be easy to fool and others not. It does fix the issue on mine of how to handle undead, when sneaking.
Naturally... The reason why i use the term 'sneaking' instead of 'stealth' is from my obsession of The Lord of the Rings as a kid, way before the actual movie.
Well I assume if the thief can see the monsters they can, in turn, see him as well. So it's both I would think. I mean is there an instance where the monsters would see the thief but the thief can't see the monsters? If there is then I agree it should be based on what the monsters see.
It is a simpler version of sneaking compared to yours that favors the thief which I think is good. You could make it that he fails if he rolls a

instead to make stealth riskier. Since he has to initiate sneaking out of line sight he won't get a chance to backstab that often which I like. He's never going to roll anything higher than 2 combat dice. The backstab allows him to possibly do 2 damage that is unblockable. Of course he still to pass a detection roll by NOT rolling a

first.
Here's an example: The thief is standing outside a door with the rest of party further away out of LoS. It's the thief's turn and he announces that he is going to use stealth. He rolls 1 movement die and gets a

. He moves 4 spaces into the room where there are 2

. He rolls a detection check by rolling one die per monster and gets a

and a

. He succeeds and the 2

don't notice him. He may then forfeit his action or backstab one of the

if adjacent . If he backstabs an orc, he would roll

or

depending on whether he's using a dagger or shortsword/rapier and any skulls rolled would be an unblockable hit. At that point the thief is detected, the door opens, and the room becomes active. If the thief decides to forfeit his action then nothing happens and the next player takes their turn. On the thief's next turn, if monsters are in LoS, he would have to roll an additional detection check at the end of movement to maintain stealth if so desired. Even if the thief decides not to move, he would still have to roll a detection roll.
I think this version of a thief is very similar to the 1st ed. D&D thief.
Other ideas for backstab:
1. Thief does 1 unblockable damage. No roll required.
2. Thief gains an extra 1 die to roll for the attack. Monster can roll defense as usual.
Other ideas for stealth:
1. If the monsters are engaged with the other party members maybe only roll 1 die for the detection roll, regardless of how many monsters there are, since they would be considered distracted.
2. Allow the thief to search for treasures in the presence of monsters while in stealth.