Kenshi is infinitely replayable, imo.

From the alternate starts, to the different ways you can even play the game (wanna be a lone trader, traveling from town to town buying and selling goods? Want to be the ultimate warrior who can go toe-to-toe with the Spider King? Wanna build a city/outpost where you can be totally sufficient and build up your own personal army to take over the world?), to the sheer size of the world. Plus all the awesome mods that can add so much to the game that already has a lot. You start off with your skills at 0 or in the low tens, and you will get your ass handed to you on an iron platter until you actually train up a bit; but even a high or max level character can still get fucked up by the wrong group of enemies.

I have mods that add a couple new factions (the fungoids are OP), flesh other factions out a bit more with more weapons and gear, and other building mods and some QoL mods so I can truly tailor my experience how I like it.

It plays kinda like an RTS with a mix of RPG elements.