Frictional Games has released a new demo from Penumbra: Overture, giving you the chance to try the upcoming commercial version of Penumbra. The game will feature major updates in both gameplay and graphics. Gameplay additions include a melee combat system, greatly improved AI and more stable physics, whicle graphics additions refer to full real-time lighting, motion blur, depth of field and advanced fogging. Release is scheduled for March 30th.