For Two Point Hospital a free DLC called “SEGA 60th Items” has been released for Linux on Steam:

SEGA 60th Items We’re excited to celebrate 60 years of SEGA’s proud history with these free items, plucked from the annals and gifted to you to spruce up your hospitals. Put a smile on the faces of your patients with historic masterpieces from arcade times gone by (and a giant one-eyed mammoth from Space Harrier, because why not?) Included: SEGA Out Run machine One-eyed Mammoth (from Space Harrier) SEGA Dream Catcher machine SEGA Periscope Arcade Game

Also an update has been released:

Added Brazilian Portuguese language option Added 4 new items to celebrate Sega’s 60th anniversary! You can find these items by using the ‘Special’ filter in the items menu. They require Kudosh to unlock for use in your hospitals. SEGA Out Run machine One-eyed Mammoth (from Space Harrier) SEGA Dream Catcher machine SEGA Periscope Arcade Game Fixes for missing text in various languages Fix for Robo-Kit icons