Going against or not actively fulfilling a pack's values may get your Sim disciplined by the members and possibly placed on pack probation. Werewolves in the pack can challenge the alpha of the pack to take the title from any rank. The further ranks of the packs are Delta, Beta, and finally Alpha. Within the pack Sims can uphold their pack's values to gain experience and eventually become a Beta rank to gain more benefits within the pack.
Once done the Sim can ask to join the chosen pack, and when joining they will start at the lowest rank Omega. Werewolves can join a pack by acting out a 3 out of 6 trials to the leader of the pack. Each pack has their own unique values which Sims must uphold to maintain their unique perks from the packs.
In The Sims 4: Werewolves, werewolves can join a pack by confronting members in Moonwood Mill, at certain locations Sims can find the werewolf packs: The Moonwood Collective and The Wildfangs. The 'Alpha Wolf' lifetime reward can be acquired by werewolves for 20,000 lifetime happiness, which grants the ability to convert others and make terrifying howls. In The Sims 3: Supernatural, werewolves who are in a group together have the option to hunt as a pack for collectibles in the open world.