Windows 95 build 28

Cougar build 28 is a fake build of Microsoft Windows, supposedly part of the Cougar project which was said to predate Chicago. The build itself is just modified Windows for Workgroups 3.11, while the Cougar codename was actually used for the 32-bit protected-mode kernel introduced with Chicago and not an entirely separate OS. However, it is possible that Windows for Workgroups 3.11 was initially forked into Cougar for the sole purpose of developing the kernel before it was merged into Chicago. Thus, builds on Microsoft Cougar with a new kernel but old shell could potentially exist.

According to the NFO file included, it was released by Battler (at the time also known as OBrasilo) on the Euro-Asian Beta Group in 2008. It can still be found online to this day.

++  |                                                    |   |       E. A. B. G.  ##     ######      ####         | |                  ####    ##   ##    ##  ##        |   |       ########   ##  ##   ##    ##  ##    ##       |   |       ##        ########  #######   ##             |   |       ######    ##    ##  ##    ##  ##  ####       |   |       ##        ##    ##  ##   ##    ##  ##        |   |       ########  ##    ##  ######      ####         |   |                                                    |   ++   |                                                    |   |  The Euro-Asian Beta Group presents:               | |     Microsoft Cougar Build 028, March 1993        | |                                                   |   ++   |                                                    |   |  Released by: OBrasilo, the RingMan                | | Author: Microsoft Corp.                           | | Type: Microsoft Confidential                      | | Class: Pre-Alpha                                  | |                                                   |   ++