The most complex simulation ever written. Manage a colony of alcoholic dwarves. The Steam version is huge (new graphics), but the classic text-based version is minuscule. Learning cliff, not curve.
Finding a "deep story" in a game under 100MB is a challenge, but several indie masterpieces managed to pack incredible narrative weight into tiny file sizes. Most of these run perfectly on Windows 7 and older hardware. Top Recommendations (Under 100MB) Papers, Please windows 7 games under 100mb
Windows 7 natively supports legacy 32-bit architecture, making it the perfect ecosystem for classic executable files and older DirectX engines. The most complex simulation ever written