This is a mod called EHOBNHAR. I've never played it, but I've read a thread. The premise is that there is no night phase. Instead, everyone has one bullet and nobody has a rope, meaning everyone in the game gets a one-shot kill they can use whenever they like.
Be careful with your bullet, I guess.
Vanilla: Has nothing but the standard one-shot kill.
Strawberry: Can insta-scry one player once per game.
Chocolate: Can find out who last used a power on a specific player.
Mint: Can make their kill post-mortem.
Butter-pecan: Always looks guilty to scries.
Neapolitan: Gets two one-shot kills.
Chocolate Chip: When their target would normally die, the Chocolate Chip dies instead.
French Vanilla: Does not get a one-shot kill.
Cookies and Cream: Revives another player, then dies.
Vanilla Fudge Ripple: Gets three scries, two of which will be wrong.
Praline Pecan: Must be shot twice.
Rocky Road: If killed, attacker dies as well.
Chocolate Marshmallow: While alive, roles are revealed on death.
Coffee: Cannot kill a wolf with his bullet.
Cherry: Chooses someone to hide behind at the beginning of the game. That person dies if Cherry is shot.
...with Rusted Nails: Is a wolf.
...with Sheet Metal Sprinkles: Is a wolf.
...with Dull Razor Blades: Is a wolf.
All roles are randomly assigned, then wolf roles are randomly stacked on.
Not all roles will be used. There will be twice as many Vanillas as there are Werewolves.
...
Rules
1) Breaking any rule will result in the cheater's(s') instant and retroactive game death(s).
2) No talking about Ice Cream Werewolf outside the game thread unless your role PM specifically allows it.
3) Do not quote any part of any PM from me or use any method to try to prove your role to another player.
4) No editing or deleting posts.
5) This is my color. Do not use it. Should red text appear, it is ideally mine or that of a dead player (see rule 1).
6) If a player has not posted within a reasonable length of time they may be prodded. Prods are cumulative, and three prods result in replacement. Giving a public notice of absence grants immunity from prods.
7) Roles are randomly assigned by die roll.
8) I can change the rules but will avoid it at all cost.
9) Anon players accepted.
10) Role proliferation statistics and helpful links will be made in the first post of the thread.