Planet Coaster 2 update 1.5.1 introduces a new Sci-Fi theme and security guards for park management.Security guards are a new staff type to handle criminal behavior like pickpocketing and vandalism in the park.Guests can now engage in criminal activities, prompting the need for security measures like Security Guards and Cameras.The new Sci-Fi theme brings static and animated scenery objects along with theme-specific audio elements.Glass panel scenery with color customization, enhanced rock and inflatable customizations, and improved pathing tools are part of the update.Two coasters have been 'de-themed' for general use, and the Trident coaster from the first game makes a return.Career mode sandbox maps and Western themed objects have been added along with ride prestige and reputation adjustments.Guest moods now display reasons for their emotions, and water rides have received visual enhancements.Bug fixes include audio tweaks, coaster support alignment adjustments, guest interaction improvements, and stability enhancements.