There's another new DLC pack for Two Point Hospital, the excellent spiritual successor to Bullfrog's classic Theme Hospital, this week, and it seems and invasion of aliens arriving at a hospital near you. Oh, and it's free to play this weekend, too.

The DLC adds three new hospitals, featuring advanced technology to treat patients from various different worlds, and includes 34 brand new illnesses to cure, as you can see from the trailer below.

Some of the ammusing new illnesses include Science Friction, Aller-G's and Lack of Humanity, with all the usual silly symptoms you come to expect from the game.

The game is free to try all this weekend, although this is just the main game, and there's currently a bundle available which includes the main game plus the two previous expansion packs at a cut-down price.