The Siege Engine can be found inside the Eastern Vault in Tunic, and it is a tough boss to defeat. In order to fight this boss, players will need to complete the Fortress of the Eastern Vault, which is located north of the entrance for the East Forest area visited at the beginning of the game. The Siege Engine guards the red gem, which is one of three objects that need to be delivered to the Sealed Temple.
Before players can fight the Siege Engine, they will need to ring the two belltowers in Tunic. This will open up the Sealed Temple as well as lead to some valuable equipment and upgrade items in Tunic. Once the Sealed Temple is accessible, players will be able to examine the three pedestals inside and start looking for the red, green, and blue gems. Although the gems can be found in any order, it's recommended that the green gem in the Great Library is obtained first, then the red one.
Related: Tunic: Beginner’s Tips, Tricks, and Strategies
To reach the Siege Engine and the red gem, players will need to activate all of the pillars in the Fortress of the Eastern Vault area. There's a connector on the ground leading to each inactive pillar, and players will need to pray to turn them on. Praying can be done by holding down the dodge and run button for three seconds. Once every pillar is activated, the large golden doors will open up and lead into the Siege Engine boss arena.
The Siege Engine uses a variety of attacks that players will need to dodge throughout the fight, but the arena is big enough to move around without getting trapped by this difficult boss. While some of the Siege Engine's attacks can be deadly, it won't be able to strike backward, so it's recommended that players stay behind it as much as possible. The
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