Yesterday saw the release of new FPS puzzler Vitrum, an interesting take on the genre bringing back the use of physics manipulation to great new puzzles for you to overcome.
GameGrin's Emsey P. Walker writes: "Vitrum is a puzzle game originally released in 2012 and has just hit Steam this year so we thought we’d take a look. The aim of the game is to navigate each room, to reach its escape tunnel and move on to the next room (there are 50 in total)."
"9heads Game Studios’s Vitrum is a 3D first-person puzzle platformer for the PC. Set in the sci-fi environment of a desert laboratory, the game lets players explore more than 45 levels full of sparkling crystals and deadly lasers." - Kim Berkley
Gamesta.com reports on a few humble indie developers that have set up a pay what you want scheme for their game. There are even free versions or demos available for 3 differing titles for whatever the taste might be.