"Iron Cow 2103AD: Phase Line Bravo" is an unofficial expansion to the core "Iron Cow 2103 AD" rules, the only issue being that the core rules have been out of print for over a year. However the expanded infantry rules are excellent and will coax players to field footsloggers , the rules for sappers also spice up the game. The "Missiles, Rockets, and Mortars" section is helpful as well, but the "Super Tanks" and "Unconventional Weapons" sections, really add that extra bit of evil genius (fielding a BOLOs for instance) to the game, but it may be better to wait untill the core rules are published as a pdf (fingers crossed, any day now) before reading these expanded rules. S