Manic Minefields (for Mac Classic)
Manic Minefields is really 12 pumped up minesweeping games in one, as it features 12 uniquely designed minefields with beautiful graphics and crisp sound effects, to choose from. Some of the minefields have special rules (i. e. obstacles), and some have different ways of displaying the... If you haven't played any of the games in the minesweeper genre, don't worry! ... It's a great workout for your brain! ... It's an addictive and fun puzzle game where the goal is to find and mark all the mines in a field, with the help of clues.
http://www.norbyte.com/ManicMinefieldsMac.sit - 2Mb - Download - Screenshot

Manic Minefields (for Mac OS X)
Manic Minefields is really 12 pumped up minesweeping games in one, as it features 12 uniquely designed minefields with beautiful graphics and crisp sound effects, to choose from. Some of the minefields have special rules (i. e. obstacles), and some have different ways of displaying the... If you haven't played any of the games in the minesweeper genre, don't worry! ... It's a great workout for your brain! ... It's an addictive and fun puzzle game where the goal is to find and mark all the mines in a field, with the help of clues.
http://www.norbyte.com/ManicMinefieldsOSX.sit - 2Mb - Download - Screenshot

IceMania
Very entertaining arcade games (see below the detailed rules) that will give you some fun and some tough brain training - whatever you choose. Destroy the wall of ice and make spring come into your life. The rules are simple - turn small squares forming the wall so that they form figures of four... The game includes three different games - strategy and time limited ones. ... This game runs on any 32-bit Windows operating system (Win95/98, NT, ME, 2000, XP) and does not require any additional software.
http://www.gameyard.com/icemania/icemania.exe - 2Mb - Download - Screenshot

Magic Games Collection
Magic Games Collection is a pack of six puzzles, including Magic Lines, Magic Balls, Magic Beads, Logic Trainer, Magic Tetcolor and Combat Engineer. Whether you want to improve your brain power or simply unwind and relax after a hard day, this joyful collection will tease your brains and help... As this line is falling, you must change the color of the blocks to make a match at the drop. ... The novelty is that here you deal with falling lines, composed of three multicolored blocks. ... In this game your objective is to make lines of at least three matching blocks.
http://www.agentix.org/download/MagicGamesSetup.exe - 5Mb - Download - Screenshot

Mega Brain Splashing 4
They came, they saw and they conquered. You are the last man alive; can you avenge humanity and bring an end to the murderous aliens in this furious mix of Gauntlet and Smash TV? Battle your way through 10 fast-paced and action-filled stages in your attempt to reach the alien queen. ... The stages are randomly generated and no two games will be alike. ... Replay the game as many times you want - it will be different each time! ... To your disposal you have many different weapons and power-ups.
http://www.karjasoft.com/files/mbs4/MBS4_1.0.exe - 5Mb - Download - Screenshot

Summer Bound
This is a free game that mixes hot action with tricky puzzles. It's in the tradition of classic games like Boulder Dash or Adventure of Lolo. Your goal is to remove all colored blocks in 30 levels. Besides a good portion of dexterity, the player needs to do a lot of brain work to solve the... Drop bombs and outwit your enemies to get access to blocks, which seem unreachable at first sight. ... Did we mention that this 30 levels long cult-game is a free download?
http://www.blueskied.com/summer/SummerBound_setup.exe - 765Kb - Download - Screenshot

Brain Gym 2 (Pocket PC)
Brain Gym 2 is a brilliant collection of four popular games which offers you a powerful mix of arcade, strategy and action. Become the smart hero in Total Blackout and restore the electric power to save your city from panic and disaster. Quickly rotate torn pieces of wire to get closed circuits... Chukchi Kerling brings to life an exotic game with colored ice blocks which still remains extremely popular with the Chukchi, the Siberian Eskimo. ... With Fast Swapper, players will enjoy the legendary Tetris-style gameplay which has been radically enhanced to make the game more attractive and...
http://www.ballshooter.com/files/braingym2.exe - 4Mb - Download - Screenshot

Sudoku Quest
Sudoku Quest. The brain bendingly addictive new puzzle game that has taken the world by storm. Choose from four levels of difficulty that will cater for beginners as well as Sudoku masters. There are hints for players who need help solving a board, and a range of elemental themes for those who... So if you like addictive puzzle games that need skill and logic to complete, then Sudoku Quest is for you. ... Play well and you could achieve high score status. ... Sudoku Quest can generate an endless stream of unique Sudoku boards that will keep you hooked for hours.
http://www.su-doku.net/downloads/sudoku_quest.exe - 2Mb - Download - Screenshot

All-Time Sudoku
All-Time Sudoku offers you a new version of the classical game Sudoku with detailed and considerable graphic. In the meantime Sudoku is one of the most popular puzzle games at all! The goal of the game is to place the number 1 to 9 into the fields of the board. ... Six degrees of difficulty will generate various games for beginners and advanced users. ... In the first place the game requires logical thinking and is very suitable to train the capability of the brain. ... If you like the correct solution will be printed together with the puzzle.
http://www.gzwo.com/download/alltimesudoku_demo.exe - 8Mb - Download - Screenshot

KGB'secrets (MUCE)
KGB'secrets MultiUser Contest Edition. Self-development game KGB'secrets is based upon some of secret technologies. It will help you to develop your general attention, visual memory, multiple objects tracking, logics, visual processing speed, short term (working) memory, to increase your brain... You can learn the basic spy habits for some days, you just have to play three simple games (Statics, Transpositions, Flashes).
http://kgbsecrets.org/InstallKGBsecretsV13(MUCE).exe - 1Mb - Download - Screenshot