Steam now offers Q.U.B.E., along with a playable demo of this first-person puzzle game from Toxic Games. Q.U.B.E. is on sale during the next week for 15% off, and here's a description of what to expect:

Set in a mysterious and abstract sterile environment, Q.U.B.E. (Quick Understanding of Block Extrusion) is a first-person puzzle game that challenges players to navigate each level by manipulating coloured cubes that surround them. There's little to go on as the game begins - the player is dropped into an all-white room with few instructions, and simply has to figure their way out. The tone of game changes as the player finds small and big alterations to their environment, supported by an original score, inviting each player to let their imagination take over as to where they might be. Through experimentation and discovery, players will progress through an ever-evolving series of cube puzzles that will challenge them with logic, physics, platforming.