Just wondering is anyone uses a house rule for disengaging from melee or running past a foe?
I was thinking it would grant that foe a melee action with the normal multi-action penalty. Maybe put in an exception that it cannot be used until after the foe has taken their first action in the combat. This would allow for surprise movements.
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For running past a foe, it would depend on whether that foe is themself currently engaged. If they are, then I'd let the PC run right past with no ill effects. The foe is too busy bashing and defending to worry about what everyone else is doing.
If the foe is currently unengaged, then sure: the foe gets a swing and the PC gets a DEX resistance check. I'd say the foe gets a sort of interrupt, so they can get that attack in even if it isn't their turn.
Disengaging is another story. If the foe has no reasonable attack actions left, then I'd let the PC disengage with some roll - it would depend on how the player describes HOW they disengage.
I would handle it the same way.
If the PC goes last in the round and says, "I'm backing up with my shield in front, putting distance between us. I didn't MOV so it should be a free action." GM, "Correct." On the next turn, depending who won INIT the foe would close the distance or the PC got away. Just one of many possibilities.
An attack of opportunity should just allow creatures with available attacks to attack. It should provide no penalty, bonus or extra attack.