
The Algo-Invaders are created algorithmically with the "unknown invaders" algorithm. Each one is unique, and carries a complexity number (big blocks times small blocks times number of eyes.) The nature of the algorithm is such that Algo-Invaders with very low (below 20) and very high (above 80) complexity numbers are rarer. The minimum complexity is 3, and the maximum is 90. Ice-mode Algo-Invaders use a different (lighter) color palette. Because they're cool. As ice. Get it?