Oceanstein is a mod for registered Wolfenstein, made by Marty Beltran. It was released on May 31, 1999.
The mod features a light nautical theme with the allusion to oceans being present in wall textures and select graphics, mainly re-colored or dabbed navy blue.
New levels can be found on E1L1, E2L1 and E2L2. The latter level was made by Brian Lowe.
The mod is playable in SDL as no coding changes were featured.