The modern Steam version requires the “Downgrader” to work well on 32-bit Windows 7. Use the (by ThirteenAG – notice the number 13 again!). This rolls the Steam version back to a v1.0-style executable.

64 MB DirectX 8.1 compatible (128 MB DirectX 9.0c Recommended) . Storage: 3.6 GB to 4.7 GB for a full installation .