From the feature: "When a game features collectibles in a good way, it’s magic. When done right, collectibles can be the most fun you can have in a game. They can give you valuable information, or be a treat to hunt down. That’s how it’s done right. Throwing a bunch of random crap into corners and hoping people will give a damn is not doing it right. You have to give players sufficient incentive to run around looking for stuff.
The following games feature awesome collectibles. These are done right."