I have a lazy metric for "worth." The federal minimum wage in the US is $7.25/hr, Edge of Fate is currently on sale for $28, so I'd need to get at least four hours of fun/play time out of EoF to make it "worth" buying, and yeah, I got at least ten hours out of the campaign. Lazy math aside, I think the campaign is pretty good, I enjoyed the story, I enjoyed the characters, I enjoyed the location, and most of the gameplay is really solid (Some of the early matterspark puzzles are tedious, but as the puzzles get more complex they get more fun, in my opinion.) The Legendary campaign is tough as nails, but what else is new? For a solo player, yeah, I think it's a worthwhile investment, especially since EoF is on sale right now. The campaign is robust, to say the least, I liked it, not everyone did, but I liked it. Pro-tip: Try to resist the urge to open every chest at the first opportunity, chests don't respawn but do scale, so it's better to leave them till the end of the campaign, if you can harness the patience.