Ares Magazine #1. World Killer is a simulation of the classic science fiction theme of planetary assault. In the standard scenario, one player commands the ships and orbital fortresses of the defending human forces and the other player commands the ships of the attacking alien forces. Beyond the standard scenario there are provided additional rules and types of ships for players to devise their own scenarios. A small game with 4 pages of rules, a 11'x 16' fold-out map sheet and 100 die-cut counters. - BoardGameGeek