Rimworld-beta-18

The update introduced rare, uncraftable "pre-collapse" technology. These "holy grail" items, like psionic emitters for mood boosts or healing nanomachines to remove permanent scars, became major focal points for late-game stories and high-stakes quests. World & Survival Changes

Added more variety to colonist breakdowns, including "Insulting Spree" and "Tantrum." rimworld-beta-18

Added for players seeking the ultimate survival challenge with almost zero natural resources. For the first time, players could adjust global

For the first time, players could adjust global temperature and rainfall parameters to create entirely desert or ice worlds. For the first time

Items and furniture now feature randomly generated inscriptions that chronicle the colony’s history, such as "this sculpture depicts the wedding of Sarah and John while three muffalo look on in the background".

For a deeper dive into the technical changes, you can view the full update history on the Official RimWorld Wiki.