Here's a description of the game taken from ININ Games' YouTube channel:
"Rainbow Arts, one of the top game developers of the 80s, originally developed and released X-Out for home computers in 1990. While most shooters released at the time were set in the air, or outer space, X-Out goes deep beneath the ocean. Now, 35 years later, X-Out is reemersing for a new generation of players, bringing enhanced graphics, updated gameplay, and even more thrilling new features."
You can watch the debut trailer below: