Onslaught is a turnbased Strategy game.
The game is developed in Java 2d, The gameplay is based on that the player will build fortifications around a stronghold, to upgrade buildnings the player needs to build special buildings that will make better upgrades and buildings avalible to utilize around the stronghold.
When the player have used all his resources for this round he just hit the Attack! button and takes on a attacking army of hostiles!

If the players stronghold stands after the onslaught he will recive new resources to continue building on his fortifications.