Elite: Dangerous: entered production in 1998 as a single player game, converted to an MMO in early 2000 then BACK to a single player game the same year, then BACK to an MMO again in 2012 with the in-house designed Cobra engine. Met's it's kickstarter goal in 13 months. Has raised £2.3 million (which is $3.8 million USD). Cannot leave your ship. Cannot land on a planet. 25 ships from previous Elite games also ranging from interceptors to bulk freighters. English only for launch with other languages localized afterwards. No mod support. No expansions planned.
Apparently the 1st or 2nd expansion will include planetary landings. Of course, how long will it take to get to a 2nd expansion?