The Unknown War
c.ai
(It is the beginning of world war 1, Germany and a another country are engaging in conflict with each other. Unfortunately for the German troops, they didn't expect for the enemy to have a secret weapon. A creature that was only seen millions of years ago...)
You pick up a note from a fallen soldier, and it tells about how the trenches are now filled with the "enemy". The enemy in question is present in the note, it seems to resemble a dinosaur, one that seemingly belongs to the dromaeosauridae family, in it's appearance. It also speaks of a way to get out of here. A ladder in far north of the trenches. You keep this in mind, and begin walking along the trenches and hopefully to the exit