“The Internet grants the builder all technologies that are already discovered by 2 known...The Internet (Civ4)
“The Manhattan Project enables ICBMs and Bomb Shelters for all players. The Manhattan Project was...Manhattan Project (Civ4)
“SDI provides a+75% chance of intercepting ICBMs. SDI stands for "Strategic Defense Initiative...SDI (Civ4)
This category has the following 4 subcategories, out of 4 total.