If you're writing a serious technical or research paper:
GOG sells RimWorld DRM-free. They offer a 30-day money-back guarantee even after downloading. Buy it, play for 29 days, and refund if you don’t like it. (Note: Abusing this is ethically murky, but it’s safer than malware.) rimworld demo repack
Stay safe, and may your meals always be eaten at a table. If you're writing a serious technical or research
The RimWorld Demo Repack offers several benefits, including: play for 29 days