In no particular order, from games I've played:
Honorable Mentions:
1000 Amps, Before the Echo, Demolition Inc, FRACT OSC, Glitchspace [Hexcells, Hexcells Plus, Hexcells Infinite (Bundle Link), Ossuary (has demo), Secrets of Rætikon, Shipwreck, The Wonderful End of the World (has demo).
Honorable (played as demo) Mentions:
Desktop Dungeons (Finished version ), Magicmaker, Paper Dungeons, The Talos Principle with Sigils of Elohim as a free side puzzle game.
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Let's see...
1) Unepic
2) Nihilumbra
3) To the Moon
4) Terraria
5) Gunpoint
6) About Love, Hate & the other ones
7) Amnesia
8) Evil Quest
9) Metal Dead
10) Binding of Isaac
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In no particular order:
Rogue Legacy
Bastion
Super Meat Boy
Castle Crashers
FTL Faster Than Light
Spelunky
Torchlight 2
Guacamelee
Desktop Dungeons
Transistor
Mark of the Ninja
Outland
Risk of Rain
Darkest Dungeon
Skullgirls
Towerfall Ascension
Unepic
I spent way longer than I should have trying to shorten it to ten. I might come back and edit this post into a top ten and have the others be honorable mentions, but it's unlikely XD
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