From the publisher:
.45 Adventure: Crimefighting Action in the Pulp Era is a tabletop miniatures game that simulates all the two-fisted action of the era of pulp magazines. Players can take on the roles of colorful heroes or unscrupulous villains. With Tommy guns, Heaters, and Gats they can fight their way through the minions of crime or seek to control the world.
.45 Adventure is designed to be played in spaces as small as two square-feet so it is great for the college student or anyone with a limited playing area who is looking to get into tabletop miniature games. But don't think that means you can't play the BIG games. .45 Adventure can handle the full eight foot playing space if the players choose to expand the scope of their game.
This book contains all the rules necessary to play, customize your heroes and villains, and create scenarios. Plus there are two sample scenarios to help you get started.