Fortify

Fortify is a real-time strategy game with a tower defense twist Defend your castle from attacking monsters and siege weapons by using ranged and melee defenders catapults cannons oil fields and more You start at the iron age advancing to the medieval age and later the imperial age Each new age enables important upgrades and allows for new techniques to defend your castle
The Steam Edition includes
Two mission maps
Multiplayer Player vs Player tower defense style
Arcade mode How long can you survive the attacks
Real-time lighting and shadows
Achievements
Leaderboards
And more
Multiplayer mode plays just like normal but instead of having enemies attack automatically every monster that attacks you has been sent by your opponent In order to gain an advantage you must learn to balance attack and defense