Enigma is a puzzle remake of Atari’s Oxyd. The goal is to roll your marble around so that it hits the special Oxyd stones (usually they are located along the level’s outer walls, like the black stones in the screenshot below), which then open to reveal a coloured tile. You can open two at a time and have to match each pair together to solve the level. That sounds easy right? The fun part is that each level has tons of traps and puzzles that make it really challenging to get to those Oxyd stones!

Believe it or not, this free game has over 1,000 levels; that should keep us all pretty busy for some time!

Download: http://www.nongnu.org/enigma/index.html . Enigma is available for Windows, Mac OS X, and Linux.

Here’s a fun little weekend project to do: make a wall sized poster to decorate your room.

There are two portable tools to help you do this. The first is Rasterbator, which now has a portable version of their online image rasterizing software. Check out their gallery for inspiration and to get an idea of how the images will look like. You can play with the size of the dots to get different effects and sharper pictures.

The second tool you can use is posteriza. This software produces picture quality images (it’s not made of dots like the Rasterbator).

PouetChess is a portable 3D chess game for Windows and Linux. It comes with 8 levels of difficulty; the default is normal. You can change the camera view according to your preference with the arrow keys.

Great little game for when you can’t find anyone to play chess with!