Humble Bundle is giving away another game, this round it is Sanctum 2, which actually has had some pretty good ratings. Sanctum 2 takes place in the future on the planet Loek-III where a major Lume colony has been established by the Britech Foundation in the city of Elysion-1.

A previous arboreal settlement, Brightholme, had been set up in the wilderness but had collapsed from repeated attacks by the Lumes, a race of diverse creatures native to the planet. It is hinted that some settlers still survive in the ruins of Brightholme and are part of an obscure organisation known as Tsygan, which is opposed to the vast, almost governmental power that Britech holds. Tsygan is a minority compared to the "Brightsiders" – those who side with Britech.

Key to the colonies' survival are Cores, which appear as large blue spheres of energy. They convert inert gases like nitrogen into oxygen, and cleanse areas of toxic mushroom-like spores native to Loek-III, which are linked to Lume activity.

The Lumes, which are hostile to Cores, propagate large plant-like access shafts until they are close to a Core, and then launch a coordinated attack on the Core until it is destroyed. If successful, the area will become swamped with poisonous spores. To counter the Lumes, the Britech Foundation has created and armed a military wing known as the Core Guardians, who are tasked to defend the Cores using their arsenal of weapons and defensive towers. The war between Britech and the Lumes has been going on and off for an indeterminate amount of time.

The player takes control of one of four Core Guardians in the game, and it is shown they travel together as a squad. Skye Autumn, the player character of the first game; and Sweet Autumn, Skye's younger sister; both follow on from their father, who was killed in action. Haigen Hawkins is a former Brightholme slum dweller who somehow managed to make it to Elysion-1 and join the military. SiMo, a robot designed to aid the Core Guardians, is the fourth character.

Minimum System Requirements

• OS: Windows XP (SP3)
• Processor: 1.6 GHz Dual-Core Processor
• Memory: 2 GB RAM
• Graphics: Shader Model 3.0, 256 MB VRAM
• DirectX®: 9.0c
• Hard Drive: 4 GB Free Space
• Sound: DirectX 9.0c-compatible, 16-bit

You can grab the free game here.