The For Science DLC pack for the manic top-down shooter Tesla vs Lovecraft sounds like it's going to be rather fun.
See Also: My original thoughts on Tesla vs Lovecraft.
To keep you coming back for more, it's adding in an infinite area called The Dreamlands, which is where you will face ever-increasing difficulty along with some fun rewards. If you manage to finish a level with 100% health you will be gifted an Eldritch Sign along with new weapons, new monsters to face, new perks, abilities and so on.
No release date or price has been given yet.