Chaos Theory adds two stronger-than-average races which pose different challenges than you'd expect, many weapons, two new plants, two ores and their respective metals. It also includes a slight tweak to the entity_default.txt file, to let dwarves visit you when not playing as them, as well as giving them one of the new weapons. Every file, except the included entity_default.txt, is compatible with the majority of mods. Now tweaked for DF2014!