Moby Dick 2
There's plenty of hubbub about saving the whales, but we've really got to be worrying about our own hides. Whales are dangerous, you see. They're huge, they've got teeth that are larger than your head and in Moby Dick 2, the arcade action sequel to the original from Mostro Games and La Ventanita Studio, they're even upgradable! Humanity doesn't stand a chance.
Use the mouse to steer Moby Dick around and cause chaos. Wanton carnage earns you upgrade points that you can use to become larger, faster, tougher or a bit less hungry. You'll need these upgrades to survive wave after wave of whalers and natives out for delicious blubber. Most of the strategy in the game revolves around carefully choosing what to upgrade; becoming larger is great for destroying boats, for instance, but you also become a bigger target which can be a problem without also upgrading your health and toughness.
While there isn't much different from the original game, when you're talking about whale-on-mankind carnage and silly action mixed with upgrades, that isn't necessarily a bad thing. Moby Dick 2 makes for a great, if very familiar, half-hour of destruction. It's also a great example of what will happen if we don't develop anti-whale countermeasures immediately. What happens when they develop firearms? What do we do then? We'll just have to hope Captain Ahab is around and armed with a minigun to save us all.