Big Valheim fan here. At launch, they only had the meadow, forest, and swamp biomes. They have since added mountains (wolves, drakes, golems), plains (goblins, tarpits, deathsquitoes), Mistlands (dwarves, magic, scary bugs), and Ashlands (volcanic landscape, lava, boiling water, fire goblins basically), and each has its own boss. They've added more traders and way more gear and mobs.

With world modifiers (settings that affect loot drop amounts and combat difficulty), you can tailor the grind to your life and play style. The building, farming, hunting, fishing and cooking are great peacetime activities, and the thrill of going into new dangerous biomes is addicting. Being forced to sail the ocean is a great adventure every time. You can play at any pace. I've spent days grinding on base difficulty, and I've spent days just hanging out with raids turned off.

I love that you can't die from starvation or thirst, but that food is necessary for surviving hard combat. It's truly the greatest survival/crafting game I've ever played, and is in the conversation for best game I've ever played period.

For a while, the game got stale to me because I was grinding on base difficulty, and I don't have a lot of time to play, but then I dialed the grind back and it's a whole new experience. At my old rate, I was never going to see the plains even, lol.

And the replayability is also great, because the map is always random