TERA Online is a highly anticipated open world Action MMORPG from developer Bluehole Studios. Today, European publisher Frogster released three gameplay videos. The three videos each show one of the many colossal monsters that players will face in the game. From the golem like Teralith to the power hungry Kumas and Ovoliths, players will take on these tremendous monsters in a wonderul yet horrifying battle. To accompany the release of these new videos, the developers have included concept art and dev notes to help give players an insight on development of the title, check them out below.