Previously, Sega used the Bayonetta Steam page to hint that the previously console only game Vanquish would be coming to PC.
Today, a picture of a sheep was placed on the Bayonetta Steam page. Sheep are a reoccurring element that appear throughout Catherine.

The rating for Catherine Classic was discovered in December by Gematsu, further hinting towards a PC release for Catherine.
There is no official confirmation for a PC port of Catherine, but evidence suggests that one is coming.