Combination Locks

[Undefined]

I have a few ideas I'd like to play with later in the world, one of those would really benefit from the addition of combination locks, rather than needing a key, someone would only need to know the combination/password to open the object or replace the lock.
Just a simple idea that I think has value in many areas.

[Armis]

Decent idea, though bruteforcing might become a thing. Maybe a small cooldown after x ammount of tries to prevent massive spamming but still allow a mistype or two.
And always openable with key.

[shubla]

May have been suggested before. I think the downside is that then no one would carry normal keys anymore.
Bruteforcing could be fixed quite easily with cooldowns or dmg to hp when picking the lock.