Here is the full list of all 27 Interplanetary: Enhanced Edition achievements.
Defeat an enemy planet.
Fire Solar Laser super weapon.
Win an online multiplayer match.
Win 5 online multiplayer matches.
Win 10 online multiplayer matches.
Win 25 online multiplayer matches.
Win 50 online multiplayer matches.
Win 10 single player games.
Win 25 single player games.
Beat the Impossible AI.
Win a multiplayer match with at least two players.
Win a multiplayer match with at least four players.
Win a multiplayer match with eight players.
Fire Asteroid Diversion super weapon.
Fire Nuclear Missile super weapon.
Destroy 100 cities over any number of games.
Defeat two enemy planets in one turn.
Build 200 buildings on your planet.
Hit yourself with a weapon fired from your own planet.
Grow five cities to their maximum populations.
Win a match with less than 200M population left.
Unlock all technologies.
Fire all the superweapons during the same turn.
Have your planet run out of material.
Have 35,000 material in stock.
Produce 15,000 Energy in one turn.
Outlive 7 AIs in one match.