Seaman is one of the Dreamcast's more unique offerings. It's a virtual pet simulation in which you feed and care for the titular creature using the console's microphone accessory.
The game has become something of a cult classic in no small part thanks to Leonard Nimoy's iconic narration. However, it has also gained attention thanks to Seaman's sometimes hostile remarks – and a NSFW Easter Egg has been discovered which takes this to the next level.
Seaman launched on Sega's console in 1999, getting a North American release the following year. It was ported to the PS2 in 2001, but that version never made it to the West. A sequel – also a Japanese exclusive – launched on PS2 in 2007.