Clinic: Deluxe Edition – 4th Extension

This offers the Basement level to build modules on. The catch is that only basement tiles can be built here. None of the other tiles (aside from Entrance tiles) can be built here, so it's quite closed off in that regard. There's no such thing as an "underground parking", which was a massive letdown.

The Basement tiles do offer some rather fun stuff, and poses as an alternative movement accelerator to conveyors... but that's about it. I don't think this offers enough for the asking price. I would skip on this unless you've already got the first three expansions and want more.

Between 4th and 5th, I'd pick up 4th, but given how little you get to really do in the game overall, I can live without the Basement tiles.

Can’t go wrong with this one