The Jackbox Party Pack 4

Werewolf doesn't show up unless you have 5 players, not counting the audience.

Anyway, this achievement is actually very easy to get. I suggest having 5 players and 1 audience member, with you obviously controlling everybody.

Keep restarting until someone (it's ok if it's the audience member!) is a werewolf. From here, I'll give the directions in list format.

Night 1: Do whatever - doesn't matter.
Night 2: Whoever is the werewolf MUST get a date. Just match the werewolf with another player, doesn't matter who.
Night 3-6: If there is not a full moon, it does not matter what you do. You will have 2 more full moons in the game for a total of 3.
Full moon #2: Have your original werewolf date someone NEW and have whoever you turned to a werewolf on Night 2 also date someone NEW. You now have 4 werewolves.
Full moon #3: With 4 werewolves and only 2 non-werewolves remaining, all you need to do is make sure that you match those 2 people with 2 of your werewolves.

At the end of the game, when it reveals monster powers and scores, a werewolf head should pop up over all 6 players, earning you the achievement!

The only tricky part is keeping track of who you've spread your lycantropy to :)

Please note that the players during the game do NOT become werewolves - they will retain their original monster power, so there are no in-game indicators of whom has become a werewolf!

Let me know if anything isn't clear! Good luck!

Load up a game with 5 players, you will automatically be given the Audience as an additional player once the game starts.
When the character roles are revealed at the beginning of Night 1, check all of your players, if nobody is a Werewolf, closeout and try again.

Once you have a Werewolf, You will need to pay attention to which nights have a Full Moon (This will pop up on the screen that indicates which night # you are on)
There are 6 nights total, of which 3 are guaranteed to be full moons (Night 1 will never be a Full Moon)

Each night which is a full moon, you will need to have your Werewolf date someone, and have them reciprocate and date back.
Once this person has been dated on a full moon night, they also become a Werewolf.
Do not worry if there is no confirmation message that the person dated has turned into a Werewolf, it still counts.

This status needs to be spread to everyone in the game, Including the audience, at the end of the game.
(The Audience is "Dated" by sending them a message on a night where you do not date anyone else)

Once you have 2 Werewolves, each of these players will need to date a new person on the next full moon night and have them reciprocate and date back.
After this night, each of these Dateee's will be a Werewolf, so you should be left with 1 Non-Werewolf and the Audience.

On the last full moon night, have one of your Werewolves message the Audience a few times to Date them and have another of your Werewolves date the last Non-Werewolf and have that player reciprocate and date back.

The Achievement should pop at the final screen when the Werewolves are revealed.