Here is the full list of all 14 SuperPower 2 Steam Edition achievements.
Conquer a friend
Conquer a complete country
Mastermind a Coup D'État
Build the AMDS
Win your first conventional battle
Conquer a single territory
Attain 95% approval and 90% stability
Create a new military design
Nuke something
Become self-sufficient in all resources
World population cut in half since start of the game
Rule the world
Alliance with the world
Reach level 10 in all technology fields