Crimzon Clover is a doujin Vertical Scrolling Shooter developed by Yotsubane. It was initially released at Comiket 79 and has gone gold, with a retail release date of January 3, 2011.
The plot-less premise is simple: fly through five different stages, using your chosen ship's weapons and Break Modes to destroy waves upon waves of enemies while dodging constant bullet barrages and racking up multipliers and points. There are three different ships to play as, as well as three different modes, all of which provide unique gameplay experiences.