If you want psychic powers and royalty mechanics without the DLC, look into:
While the idea of a free expansion is tempting, DLC unlockers (often third-party scripts or cracked files) come with significant downsides that can ruin your 100-hour save file. rimworld dlc unlocker better
Biotech added children and genetic engineering. You can find similar (though less integrated) mechanics through: If you want psychic powers and royalty mechanics
RimWorld DLC Unlocker Better: Why Mods and Legit Content Win Every Time rimworld dlc unlocker better
Files claiming to "unlock" paid content are notorious for carrying malware or miners that can compromise your PC. Why Legit is "Better": The Power of the Steam Workshop