try that cool strategy game, similar to utopia and dark throne.
no need to download anything just build your empire and smash other empires

no need to spend a lot of time, you get 2 turns every 15 minutes and can have a base of 400 turns at once.
so you just need to log once a day or 2 days
i recommend that you read the guide before you start playing

link:
http://prom4.toprpgames.com

WARNING: game is addictive!!