No revenue estimate for PSN — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $11.1M — a different platform, not this one.

Undertale

The PC classic UNDERTALE comes to PlayStation®4! Explore a rich RPG world full of strange and delightful characters where violence isn’t the only answer. Dance with a slime...pet a dog...whisper your favorite secret to a knight...or ignore all of that and rain destruction upon your foes. The choices are yours—but are you determined enough to prevail? Features: · Killing is unnecessary: negotiate out of danger using the unique battle system. · Time your attacks for extra damage, then dodge enemy attacks in a style reminiscent of top-down shooters. · Original art and soundtrack brimming with personality. · Soulful, character-rich story with an emphasis on humor.