$60 or more
If you backed Bloodstained: Ritual of the Night, you may want to take a look at your contribution level. IGA and his team have just added another bonus to the $60 tier, which includes access to a PC beta by way of Steam. While a lot of other developers have used this scheme (hello Early Access), it directly parallels the folks over at Inti Creates, who Kickstarted Mighty No. 9in the same fashion.
Hopefully it will go over better than that beta did though, where everyone expected Mightyto look like the original concept art. Maybe Bloodstainedwill look exactly like this.
Update 5 [Kickstarter]