From the introduction: Advanced Arms is a supplemental book for the Ops and Tactics roleplaying game, focused around elements of science fiction and high technology. It makes synthetic beings and two offshoots of humanity available to create characters from, and introduces high-tech computers, energy weapons and cybernetic implants along with rules for space travel and games that span between stars. Plasma and laser weapons are advanced electrical weapons that can punch through conventional armors like butter and can be upgraded with exotic firing modes, but require heat management to continue functioning. Cybernetics can make a character more than human, granting them capabilities far above and beyond what flesh and blood could grant. The space travel rules provide a system for designing spacefaring vessels and combat between them, as well as guidelines to help design the worlds that they may visit. Advanced Arms can be used to run games ranging from the near future all the way to something approaching space opera.