Re: Post here when you beat a game. I mean it!
Just beat Link's Adventure on my GC. I can kinda see why it seems so out of place in the Zelda series. It's not so much the fact that it's a side-scroller. I think it's more because it's not much besides a thinly-veiled action game.
It has less depth than even the first Zelda. In that game you had boomerangs and bows and bombs and magic spells, not to mention the dungeons had puzzles. Link's Adventure is rarely ever more than just slash slash slash your enemies, proceed to next room, slash more. When you get special items, like the raft or the flute, you use it once (usually immediately after you get it), then forget it exists. Same goes for most spells.
Despite all this I did enjoy the game quite a bit more than the original. It was fun in a ninja gaiden/castlevania sorta way. I doubt Zelda would've lasted as long as it has if they had stuck with that format though.