SteamPac is a new version of Pacman with a steampunk feel to it.
Steampunk is a genre created in the 80s and 90s that incorporates science fiction, fantasy, and horror elements. It involves a setting where steam power was the main form of energy, and is often portrayed in a Victorian era England setting.
SteamPac consequently has a nicely grungy steampunk feel to its graphics, and lets users play in 2D and 3D modes. The gameplay is identical to the original Pacman game. You troll around a simple maze, eating little balls and trying to avoid the ghosts who are out to kill you. Turn the tables on the ghosts by eating power balls and chasing after them as well.
The 3D mode of SteamPac is actually really cool, since the camera follows you around as you move Pacman through the maze. SteamPac is a breath of fresh air in the genre of Pacman games.