Super 3-D Noah's Ark
This is the PC version of the game Super 3D Noah's Ark by Wisdom Tree Games. It uses a modified (licensed) version of the Wolfenstein 3-D engine, with added support for textured floors and ceilings. Super 3D Noah's Ark's homepage is at http://www.wisdomtreegames.com/games/super3dnoahsark/, where it is still for sale.
As the game uses a licensed version of the Wolfenstein 3-D engine, it shares the same file formats.