8. Mark of the Ninja
Units Sold: 1.1 million
Metacritic Score: 90.5
We are continuing our list of most successful indie games of all time with Mark of a Ninja, that is a side-scrolling stealth game where you play a nameless ninja at present times. This game does great justice to the mostly ignored stealth genre in video games. It got a lot of critical acclaim, with reviews citing praise for various aspects including graphics, audio, and gameplay. The game also does a great job of mixing modern technology to the ancient ways of the ninja.
