The Obelisk
EH: Phaelos, 2017

In Event Horizon: Phaelos, players found they weren't alone on that frontier planet. Phaelos also housed an Ancient Artificial Intelligence, a superweapon built by ancient humans that was capable of destroying entire planets. Players spent most of the weekend deciphering ancient puzzles to figure out how to open it - upon doing so, they quickly realized that they triggered its self defense mechanisms. They hurriedly figured out how to pacify it and registered themselves with it as the new citizens of Phaelos. 

The Obelisk, as gamewriters termed it, took around 250 hours to build, using eight pieces of 8ft x 4ft sheet metal. It cost just over $1000. In its final form, it weighed over 200 pounds. 

The Nodes
EH: New Gyr, 2018

In the second installment of Event Horizon, players represented a variety of interested parties all vying for power on Phaelos. The end of game culminated in an all out war for control of the planet's communications upload platform. They battled for control over three nodes, hacking them for whatever side they represented.

Each node had a series of escape room-like puzzles for players to solve, built with arduinos. Upon completion, these unlocked a hacking simulation on the main monitor, which allowed players to claim the node for their team and eventually take over the planetary network.