Powargrid is a fun turn based strategy game that focuses on power supply and disruption.  You build out from your power station, building a powergrid, then add attack towers to attack and destroy the enemies structures.

In all cases power is key, you need to protect your power stations, while trying to reach across the map and destroy the enemies.  As well as transporting energy, power lines come in handy for blocking build paths, while cannons and towers are great for attacking enemy structures.  It’s great fun to play and makes for some very strategic battles.

Powargrid also features a campaign mode with a nice sense of humour, online or hotseat multiplayer and skirmish battles against computer opponents.

UPDATE: This Alpha Is No Longer Available