I found this game to be quite fun for single player; however, I found that the multiplayer was, for the most part, a mad free-for-all with a bunch of dudes playing as women wearing nothing but underwear (I dunno if that part was all bad) (well, since it was mostly guys playing, maybe). It reminds me of an oldish game called Feudalism, which was one of my favorite online games. Combat is quite refreshing compared to the usual, say, Elder Scrolls game, which is mostly hack/slash (which I admit I like a lot, hacking is fun, slashing is better) and since there is a free DEMO download available from steam (which includes a good portion of the game) I would recommend trying that first. I, for one, have gotten about 150 hours out of it, which I feel is about the ceiling for a game like that before it gets redundant. FYI, my local Half-Price Books had a copy for $8 (I know, weird).
If I were to make something out of LEGOs, I would probably use LEGOs. Pretty advanced stuff going on up in my head.