Portal 2: Community Edition promises to up the game's modding potential, and it's in open beta now

Improvements to map editing, a new lighting engine, volumetric fog, and other improvements await.

Lunum Mines 100% sector walkthrough in Pragmata

The Lunum Mines is the fourth sector in Pragmata, and it has five blocks: Mine Entrance, Crane Operation Yard, Warehouse, ...