In Like a Dragon: Infinite Wealth, the Premium Adventure game mode becomes available after completing the main storyline, which concludes in Chapter 14. This mode grants players the freedom to explore the game's settings in Hawaii and Japan at their leisure, allowing them to complete any unfinished tasks.

Premium Adventure mode enables players to unlock and complete substories, continue to enhance Kasuga and Kiryu's stats, achieve in-game completion tasks, and earn Trophies in Like a Dragon: Infinite Wealth. This mode operates as a non-canon extension of the gameplay, where players' actions and the outcomes of the narrative do not influence each other.

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Infinite Wealth's Premium Adventure Mode

Unlike New Game+, where players start over with certain elements carried over, Premium Adventure continues from where the primary playthrough ended, maintaining all player progress. Additionally, this mode provides access to The Big Swell, an endgame dungeon available exclusively through purchase of Infinite Wealth's paid DLC "Master Vacation Bundle," which also includes the game's New Game+ game mode.

Kasuga's party in Like a Dragon: Infinite Wealth.

The narrative of Like a Dragon: Infinite Wealth is divided into fourteen chapters, each primarily focused on the conflicts faced by a specific protagonist in different locations: Kiryu Kazuma in Japan and Kasuga Ichiban in Hawaii. The game's structure does not initially allow for free travel between its primary locations; players are unable to travel between Japan and Hawaii until they have first beaten the game.

This restricted players from completing some tasks until access to the required area was regained, typically in a subsequent chapter. This could hinder players from obtaining necessary materials for crafting, forcing them to wait for the next chapter to progress. While it's feasible to complete all tasks before finishing the game, many players will likely have unfinished business to address.

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To facilitate easy switching between protagonists Kiryu and Kasuga in Like a Dragon: Infinite Wealth, and thereby access to Yokohama and Kamurocho (as Kiryu) and Honolulu (as Kasuga), the game incorporates a system similar to the one used for switching between Kiryu Kazuma and Majima Goro in Yakuza 0.

How to Get to Isezaki Ijincho and Kamurocho, Japan

Switching from Kasuga to Kiryu in Revolve Bar in Like a Dragon: Infinite Wealth.

To travel to Isezaki Ijincho, in Yokohama, and Kamurocho, Kasuga must visit Revolve Bar in Hawaii, proceed to the hideout room upstairs, and interact with a phone near the window. This triggers a "Change protagonist" prompt, allowing him to switch characters to Kiryu in Japan upon selection. Kiryu can then travel between Isezaki Ijincho and Kamurocho via the taxi system.

How to Get to Honolulu, Hawaii

Switching from Kiryu to Kasuga in Revolve Bar in Like a Dragon: Infinite Wealth.

To travel to Hawaii, Kiryu needs to head to Isezaki Ijincho and go to Survive Bar. Here, he should head upstairs to the hideout room and interact with a windowed door. Selecting "Change protagonist" here switches the gameplay back to Kasuga in Hawaii. Kasuga has access only to locations within Hawaii.

Players' party configurations and gear remain as previously set by each protagonist, requiring players to adjust their equipment and party members as needed for continued gameplay.

An important note is that while players can include both Kasuga and Kiryu in their party, the primary protagonist's role depends on the current location: Kiryu leads in Yokohama, and Kasuga takes the lead in Hawaii. Gameplay in each region hinges on the survival of the respective protagonist; if the leading protagonist is defeated in battle, it results in a Game Over. However, if the non-leading protagonist is knocked out, gameplay will continue and that party member will be resurrected after battle.