Yup! Or, more or less. We did a bunch of these in another thread (called "A riddle for ye"). I've always like large, elaborate puzzles that combine many different elements. To make them more fun, I sometimes go out of game for some of them. For instance, something I've been working on:
The PC's will certain magical word to open the gate/portal etc. to the place where they need to go. To get this word they need to decipher an ancient language/code on a wall. First, they need to translate the language into english/common. The way they do this is by consulting a map of the dungeon that they've picked up. The map labels rooms by A,B,C,1,2,3 etc. On each door (or located in each room) is a symbol corresponding to the label on the map. Using these, they can piece together the foreign alphabet.
They then need to figure out what the letters mean. Now I don't have my notes in front of me, but I think the way I was going to do it is something like this.
--------------------------------------------------
ASCII
72  68  46  47  71  68  46
84  78  67  68  82  69  72
84  65  79  78  65  67  84
80  50  77  65  77  79  77
__  90  __  45  47  68  76
__  __  __  79  __  69
__  __  __  45
CCGCTTGGACGTGCGGAAGTAGATTAAGTC
--------------------------------------------------
I'll probably tweak it a LOT, but this was just something like what I have in mind. I'm going to add a few more puzzle elements, as this part is mostly just decoding at this point. Yes there are a few issues with going "out" of the game, but my players don't role-play or stay in-character that much anyway (unfortunately).