Incremental Zoo game from Buzzfeed's 10 Incredibly Addictive Browser Games That Will Consume Your Soul
Adam Rifkin stashed this in Best of BuzzFeed
At first, Incremental Zoo might not look like much, but as soon as you buy your first couple meerkats, you’ll be hooked. The format is pretty basic, and the mechanic is very simple, so don’t expect a ton of surprises, but if you’re pretty new to the incremental game world, this is a pretty good place to start.
In Incremental Zoo, you buy pairs of animals and encourage them to breed so that you can buy pairs of more expensive animals and so on and so forth. New species of animals are introduced periodically, so there’s always a new goal on the horizon.