Keys

Key 1

A public video was given to players that describes a minigame to play as a break from this massive ARG. MatPat goes into how the ARG has been a fun experience to work on, and plans to reward the top 100 finishers of this minigame with a free Chaos Theory T-shirt. MatPat then proceeds to explain how this shooter-style minigame works, and emphasizes speed and patience. In order to get to the minigame, MatPat notifies players to add the three scores of the gameplay shots shown on screen earlier in the video. Adding up these scores (44 + 24 + 9) gives us 77 as our first key.

Keys 2-4

There are no set keys here. These are randomized for each player once they finish each difficulty of the minigame. As for tips on how to beat the minigame:

The lone hint given to players alongside the minigame.