Vehicles fighting it out underwater, people. Dogs and cats living together. It's just crazy. And it's happening today in Rocket League.

Developer Psyonix is releasing the new AquaDome DLC today at 10 a.m. PT / 1 p.m. ET with a free arena of the same name, along with model redesigns for the Hotshot and Road Hog. There will be new customization items, seven new achievements and trophies, and additional in-game refinements and adjustments.

And for the premium goodies (that means there is a prioce attached(, players can grab two new vehicles matching the arena's aquatic theme: the Triton, a slick, futuristic ocean submarine, and the Proteus, a research vessel. Both sell for $1.99. A new Champions Season II Crate can be opened with keys. Proceeds from that will help fund Psyonix's eSports initiative for the game.

If you've been living in a bubble and don;t know about Rocket League, it has become incredibly popular, having hit 19 million users back in July. And be sure to #DoItForShacknews with a special Rocket League community flag.