Orc Invasion is a big war with a lot of scary and fierce Orcs. As a general, you have to protect your house from enemies who are coming to attack.
The orc army is coming to attack your castle. Try to drop the monsters with your arrows before they reach your walls. Use your special skills to help you live as long as you can. Rain arrows down and try to get the best score you can before you die.
Have fun and good luck!