Blue Spheres originates from the classic game Sonic The Hedgehog. In-game, it appears as a virtual minigame, in which your screen turns into a 3D world. Survivors play as Sonic The Hedgehog and are in a flat space full of blue, red spheres, and rings. The goal is to collect the needed amount of blue spheres displayed at the top left, in order to survive. If players touch a red sphere, they will not be killed: instead, they simply exit the minigame and lose their streak at the end of the round.
A copy of the Bombers memo.
- Blue Spheres is extremely difficult, due to its awkward controls and suddenness.
- If Blue Spheres occur in a Mystery Disaster, it's not possible to survive due to the very short round duration (45 seconds rather than 90)
- Blue Spheres is a very buggy disaster. It can appear as a boss round, after the "Boss Time" alert, or replace a Dynamites round.