Would you recommend any of those games? I already own Risk of Rain, but I feel like I'm not very good at platformers lol. Then again I've barely played any so I'm not sure.
In that case, I would not suggest Super Meat Boy or Dustforce, lol. LIMBO, too, is a "death is everywhere" kind of game.
Honestly, all of these games are highly recommended in general -- they're all known for being really good indie games. It just depends on what you're looking for.
Braid is renowned for its story, which is a huge accomplishment for a puzzle-platformer game, if I do say so myself. It features a time manipulation mechanic - if you mess up a jump, you can rewind and try again. On that note, it'd probably be considered more of a 'casual' platformer overall, so it might be worth looking into if you feel like you suck at platformers, lol.
http://store.steampowered.com/app/26800/
It was recommended to me for years, and funny enough I finally bought it on sale a few days ago.. and now I have a duplicate. lol.
Dungeon Defenders is one of the games that my boyfriend and I play together, it's a really fun tower defense game. I'm not a huge fan of the genre, but I love it, lol. Although I'm not sure I could recommend it if you don't have anyone to play it with - I've never tried it solo, only with Boyfriend.
Antichamber is an acid trip. It's also a puzzle-platformer, of sorts. At least that's what I sort of got out of it. I, personally, found it difficult to play at times because I'm partially color blind, and for a mostly monochromatic game, the colors really ****ed me up when they did happen.
Here, maybe the store page can better show off and explain that for me;
http://store.steampowered.com/app/219890/
But it's not one I have enough experience with to say either way, much less to speak for someone whose cone cells are intact.
World of Goo is on my backlog - it's a physics-based puzzle game. Which makes it interesting to me, at least. =p