half of those have inflated figures through humble bundles though, especially Risk of Rain as they were giving four packs away in one bundle. But i guess a sale is a sale.
chivalry: released in 2012, 1 bundle (trivial unit sales), sales as low as 90% off
ftl: released in 2012, 3 bundles (~800,000 bundles total, FTL was BTA in all bundles), sales as low as 75% off
orion: can't calculate number of bundles because of name changes, but prices as low as 95% below original launch price, and it's been in a bunch of turd bundles
7 days to die: no bundles, never been more than 60% off
guns of icarus online: 6 bundles, sales as low as 85% off,not sure how many bundle sales
risk of rain: 3 bundles, price as low as 75% off (200k+ bundles?)
divinity: 0 bundles, 40% maximum discount
shadowrun returns: 75%+ sales, 2 bundles (200k? sales?)
planetary annihilation: can't figure out what's going on with this to check price or bundle data
thomas was alone: 6 bundles, 75%+ off, many hundred thousand sales from bundles
i would say in light of that, 7 days to die and divinity are both quite impressive.