SimTower was actually a Win 3.x exclusive afaik. But this is about such games on GOG, and it's not.

Windows 3.11 was nothing more than a very advanced Dos Shell. Like it's precursor DOSSHELL or GEM. Though, that did slightly skew with things like WinG or 32s that made it more shaped like a proper operating system.

To explain simply: Windows back before the NT Kernel, could not exist without DOS to use as a foundation.

And in fact, this was how it was until Windows ME. Of course, exiting to DOS was discontinued after Windows 95.

From my side I would totally recommend two Win95 titles - Missionforce: Cyberstorm (1996) and Final Liberation: Warhammer Epic 40k (1997). Extremely fun turn-based strategy/tactic games. And surprisingly accessible . Latter has great soundtrack by the way.

Final Liberation is currently on sale :)