Dark Interval

Dark Interval is a Half-Life 2 mod built to restore original locations, characters, and plot points from earlier drafts of the game that never made it to retail — drawing primarily from the concepts and design history documented in Valve's book Raising the Bar. Rather than reassembling disconnected pieces, the team built a complete and stylistically coherent world by filling gaps, discarding failed designs, and constructing entirely new maps from the ground up. None of the leaked 2003 build content is included — everything here was built to be modern and internally consistent, not just a modernized fix-up of something older.