Official sites

Uber Entertainment website - Uber's official website, you can purchase Planetary Annihilation directly here

Uber Entertainment Forums - Uber's official forums, which include Planetary Annilation

Planetary Annihilation on Steam - There are forums and videos here, and you can purchase the game too

Unofficial sites

PA Matches - Planetary Annihilation Gameplay and Resources

eXodus eSports - An organisation that organises Planetary Annihilation tournaments

PA-DB.com - An online database of units and structures in the game

Websites for mods and modding

PA Stats - Statistics tracking mod

PA Stats Ladder - An ELO-based community ladder, built using statistics gathered from PA Stats users