Published: April 2026 First released in 1999 by Sierra On-Line , 3D Ultra Cool Pool (sometimes shortened to Ultra Cool Pool ) is a fast‑paced, arcade‑style pool game that blended realistic physics with a vibrant, cartoonish aesthetic. Part of Sierra’s “3D Ultra” series, the title offered a fresh spin on the traditional eight‑ball and nine‑ball formats, adding a host of wacky modes, power‑ups, and multiplayer options that made it a staple of late‑90s PC gaming rooms.