How do you unlock all crossy road characters?

To unlock all characters in Crossy Road, you can collect coins while playing and use them to purchase random characters from the in-game shop. Additionally, some characters are unlocked by completing specific challenges or reaching certain milestones, such as playing a certain number of games or achieving high scores. Seasonal characters may also be available during limited-time events. Lastly, you can try your luck with the mystery box, which can be earned or purchased for a chance to unlock new characters.