This FREE pdf clocks in at 14 pages, 2 pages of SRD, leaving us with 12 pages of content, so let's take a look at what this offers, shall we?
As you can see, this pdf is FREE and about PUZZLES. Yes, puzzles. Remember those? You know the type that, back in the days of 1st and 2nd edition, provided the awesome brain-teasers, the food for your grey matter beyond crunching combat-numbers? Yeah. There aren't many around anymore, which I consider rather a pity - so what are these about?
Essentially, the idea is relatively simple - you have crystals and rods to poke the crystals with. There are three types of rods - one red, one green, one blue.
Crystals can have up to 4 different colors - red, green, blue and clear. Each of the rods has a specific result when poking a crystal. Taking for example a blue rod to poke a crystal will have the following results:
-It makes a red or green crystal blue.
-It makes a blue crystal clear.
-It also affects all adjacent crystals (not those diagonally adjacent) to the crystal touched.
Each rod has a different array of such rules that make figuring the puzzles out rather fun - and easily expandable.
Each Puzzle herein has a base configuration of colored crystals and a goal configuration to reach and the difficulty ranges from child's play to challenging - the penultimate puzzle took my group about 30 minutes to get right and my guys are good at solving logical puzzles. If you as the DM can't be bothered to solve this, sample steps to solve the puzzles are provided, though it should be noted that these not always are the most efficient way to solve these.
Now if this looks rather underwhelming on paper, rest assured that it's actually fun if your players enjoy actually thinking and flexing their mental muscles. I know my players enjoyed it enough to to make me make puzzles like these the basic technology of hotwiring the creations of one particular ancient civilization in my game.
While primarily intended as a mini-game while waiting for the one guy who's late, the 5 sample puzzles provided can easily be expanded by an enterprising DM to include many, many more. A total of 4 pages of dot-cut-outs to represent crystals is provided as well, if your players need a visual cue - for advanced groups, I'd suggest not providing these, since it makes the task slightly more complicated and is a nice memory-training exercise.
Now the pdf also offers some advanced tricks - If your players have too hard a time, provide a multi-colored rod that can change colors - especially nice if your PCs failed to find one of the rods. If you're sadistic (or to reflect botched UMD-checks, there is a variant which changes a random crystal's color every 5 moves. This should NOT be used for the more complex puzzles, though - your players won't be happy about it. Finally, there is a kind of template for a golem who can be tuned to a color, with different special attacks based on the crystal color they're attuned to.
Editing and formatting are very good - while I noticed some minor non-standard rules-language in the end, that is not something problematic or grievous in a free product. Layout adheres to a printer-friendly two-column b/w-standard and the pdf has rudimentary bookmarks.
Okay, I'll come right out and say it - I love this pdf. A) It's FREE. B) It inspired me - the possibilities of this deceptively simple system are endless - more complex patterns of crystals? Possible. A Ziggurat that needs to be solved, with crystals strewn throughout the dungeon, requiring exploration to get the pattern and then solve it? Possible. Creatures that have superb defensive powers (Vastly increased DR etc.) and need to be solved first, requiring attacks with the rods while they try to bash you to smithereens? Possible. The potential of this humble little book is staggering and it simply is FUN. Now granted, if your players don't enjoy logic puzzles, then this might not be for you - but come on, give it a try. Remember those days when gaming was a teaser for the intellect as well as the imagination, from the time to which we point when we tell ourselves that gamers are above average in intelligence. Unleash your nerd and dare to use some fun puzzles - you literally have nothing to lose with these - they're for FREE and well worth 5 stars + seal of approval - an awesome free product by Bradley Crouch.
You can get this neat pdf for FREE here on OBS!
Interjection Games also currently has a kickstarter running for "Strange Magic" - check it out if you're by now bored by Vancian casting and want to see a Tome of Magic-style book done right!