A very original rule full of small square bricks gliding in all 4 directions. The rule features still life, gliders, puffers, guns. A rule by Mirek Wojtowicz. Bustle Exploding A busy rule which generates many small ships and puffers. Large complicated ships can easily be built using combinations of colliding puffers.
Several stretchers are also among the basic elements.
The small ships can usually be expanded using simple techniques to generate ships of arbitrary width and height. A rule by Brian Prentice. What comes up, must go down. The professional career simulation. A rule by Mirek Wojtowicz.