In Takeda, you are Takeda Shingen, the 16th Danjo of Province Kai and leader of House Takeda - and you are known as one of the greatest tacticians ever. Your country's peace is threatened by an invasion and you also need to expand the country a bit. If you are successful, you can end the civil war and your way to Kyoto and political power would be open. If you fail, everything you had and loved will be gone forever.
Takeda is a hardcore realtime strategy game in ancient Japan where you command whole armies. Thousands of units are on the battlefield - and you need to command them all, preferably at once, to defeat your opponents army.