Manorvania. Play online, play for free
Supported OS: Windows, OSX, Linux, Android, iOS
Browser requirements: requires HTML5 support
Manorvania is a vampire action platformer inspired by the classic Metroid and Castlevania series. In the role of a vampire named Vlad, you have to explore a huge mansion, find friends scattered around it and stop the revelry of skeletons summoned through your own fault.