This week, Microsoft plans to keep our brains healthy, probably, since they are only releasing brain teasers on Xbox Live Arcade - games such as Coffeetime Crosswords and Puzzle Quest: Challenge of the Warlords, plus a completely free DLC pack we're going to talk about a tad later.

First of all, the headliner of this week's XBLA releases is Coffeetime Crosswords, a real crosswords challenge published by Konami and developed by Penny Press, which will be available for 800 MS Points ($10). The game features over 150 puzzles for all skill levels and it includes both single as well as multiplayer modes. So, if you are a crosswords fanatic, this title is the best for you.

The second game coming to the Arcade Hits is Puzzle Quest: Challenge of the Warlords, the title which brings classic puzzle action backed with an epic, cliché story of good versus evil. The game also allows you to play it in both single and multiplayer modes and it will have its price reduced to 800 MS points. And we all know that whenever a product gets cheaper, it seems to be more appealing (especially now, following the Xbox 360 price drop).

The free DLC pack is delivered for another game that can be used to train your brain, Buku Sudoku. It brings no less than 1200 brand new puzzles for you to solve (which means about 12 free real life sudoku books or over three years of puzzles from your daily paper!). All these free new sudoku grids can be experienced in all game modes: co-op, head-to-head, battle, casual and timed. So, if you're not too busy downloading the Too Human demo which is already available, wait until the 16th of July and get any of these three brain training games.