This is my own beliefs, so if you don't like it...well...sorry! Also, I haven't tried that many. I like indie games with deep and clever stories, but I am not a fan of the new movement of retro/pixel graphics.
Free games that are definitely worth your time. At least try them out.
Exactly what it says on the Tin.
Can change the moment the least you expect it. It also can (and does indeed) go on forever.
Not in order, I couldn't put one game over another. They are all amazing in its own way.
The official list of games created by members of CIGG.
A list of 2D platformer games, recent and classic.
Bullet hell favorites.
Nothing more, nothing less.
No constraints, no rules.
A list of video games developed by Rebourne Studios.
A list of my favourite games.
A big list of (almost) all brazilian games launched on Steam, even the removed ones.
Attention: This list is in development, help is welcome.
Games missing in IGDB:
Brutal Force - https://steamcommunity.com/app/373280
Cannibal - https://store.steampowered.com/app/350800
Compiling a list for a big nintendo switch indie stream I plan on doing.
25 lists of video games that were tagged as 'indie'
Each list was created by members of IGDB.com