My town was overrun in my last night's dream, too. Except it wasn't monster like creatures, but living toys.
The dream started with me having breakfast with my parents, when we were interrupted by some weird noises coming from my little sister's room. We went in and found a mass of barbies having sex on the floor and her trying to separate them since she didn't want another baby born doll. Our dog ran in and started ripping the barbies to pieces, and after a few couples had been reduced to shreds, the rest of them quickly retreated under the bookshelves.
For some reason, I decided to rush upstairs to my room at this point. I quickly grabbed my longsword, bow, and a few quivers full of arrows, and went out of the window onto the roof of our first floor. There was an all-out war going on outside. A squadron of fighter planes rocketed over me in pursuit of a giant radio-controlled flying saucer, which was shooting laser beams back at them, and some paratroopers were trapped in the nearby playground by a horde of human-sized plastic army men. I shot the two officer-type army men leading the group with my bow, and quickly descended from the roof to the other side of a corner when the rest of them turned and opened fire at my direction.
I wandered through the fighting around the town for a while, and soon found myself at the Turku Cathedral. I entered and ran up the stairs leading to the bell tower. I met a black-and-silver dragon I was friends with at the top, and she agreed to transport me to the Turku Castle. We took off through the window. When we got closer to the castle, I could see it was being assaulted by an army of human-sized lego knights, complete with lego catapults and trebuchets. They had a lot of archers, too, but they were using the bows as melee-weapons since their arrows were fixed together with the bows. There were also a bunch of lego wizards who were, apparently, the reason for all of the toys being so large. The castle was a medieval castle, not the unsuitable for battle Renaissance version it really is. The dragon didn't want to attack the legoes, since the smell of burning plastic got on her nerves and she didn't fancy it's taste either, so she only dropped me off on the courtyard.
The castle was full of people fletching arrows, making chainmail, and stuff like that. Markku Vilppola, the cutler from the Kurala Village of Living History, was busy making weapons in a corner. There wasn't a lot of actual warriors in there, though: only the members of the Turku branch of the School of European Swordsmanship, the Guild of Armoursmiths of Turku, and Karl Knutson's Archers. I joined them on the walls, and that's when I woke up.