Miloo7 suggested I remake this thread, since it was removed when the forums were wiped. Only a few of the achievements suggested were added, and I think there a few good ones worth mentioning.
Achievement Ideas
Bookworm: Journalist (15/15)
You received a system message from the mafia!
You must win a ranked match to receive this achievement
Does not count if hooked or drunked
(Miloo's Suggestion) Fortune Teller: Enchantress (10/10)
You correctly gave a crystal ball to a mafia member, which was then passed to someone who died and made that mafia member revealed.
You must win a ranked match to receive this achievement
Does not count if hooked or drunked
(Nicole's Suggestion) Under A Spell: Enchantress (15/15)
You correctly gave someone a crystal ball who died and chose to reveal a mafia member!
You must win a ranked match to receive this achievement
Does not count if drunked or hooked
I Found Your Facebook: Stalker (20/20)
You successfully stalked a power role!
You must win a ranked match to receive this achievement
Does not count if drunked
Chatterbox: Loudmouth (20/20)
You were visited by the mafia and survived!
You must win a ranked match to receive this achievement
Does not count if killed
Can be saved by bodyguard, doctor, etc.
(???) Blacksmith (20/20)
You successfully vested someone who was shot that night!
You must win a ranked match to receive this achievement
Does not count if target is killed that night
Does not count if hooked or drunked
(???): Fabricator (20/20)
You successfully had a gun backfire on a target!
You must win a ranked match to receieve this achievement
Does not work if drunked
Lights, Camera, Action: Celebrity (15/15)
You survived the whole game and voted a mafia member twice!
You must win a ranked match to receive this achievement
Works if saved my doctor, bodyguard, etc
Modifications to current roles:
Lower the achievement amount of the granny achievement (and any other achievement that has not been received more than 100 times)
Include killer as a successful target for "Death Row"
Rename bodyguard achievement "I Got Your Back"
Use bodyguard's "Not On My Watch" for the watcher achievement instead
Broken/Glitched
Lucky Kiss (?), Boozin', Ultimate Sacrifice (?)
Also: Not sure if this affects Governator, but gov is glitched. If someone is vegging and being voted, they die and go to the graveyard, but governor can overturn the lynch to another person, thus giving town two lynches.
If you have any ideas for more achievements, better names, modifications, or know of a glitched/broken achievement, comment below and I will add it here.