Shumps! is one of the most famous and oldest sites that is dedicated to the shmup genre. This is actually the 3rd incarnation of the site, the first being created in 1997. Over the years, the site reviewed many games across a number of game systems, some which are obscure such as the MSX and Sharp X68000.
Once, the editors created an idea for a game which was more in line with Twinkle Star Sprites in which there would be a two-player competitive shmup which pits players against or helping one another. The ships used would be from the more famous games and have both horizontal and vertical types, similar in idea to Xeno Fighters EX-R. This concept game was called Polygenesis.