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