They were collectibles in the good sense because they RS 3 Gold

They were collectibles in the good sense because RS 3 Gold they leveraged the core gameplay (climbing, back when it was still fresh and new to deliver both thematic chunks and more importantly, more interesting gameplay.On the other hand, the nadir of the collectibles in AC2 were the feathers.

They were primarily there to give reason to the empty open world. The designers would make a cool space that wouldn't get featured in a mission, so they would throw a feather or two there to incentivize the user to actually look at the work they put in. But it doesn't leverage the actual core mechanics well; looking around isn't a skill that one can improve.

Furthermore, while the designer of a subsection  Cheap Runescape 3 Gold in AC may have worked hard on a certain environment, it's still made up of the standard building blocks used elsewhere (everywhere so busily it starts to resemble a noise map. Which is also a nice metaphor for doing the same zerovariance thing in collecting the feathers noise.