Custom Scenarios for Insurgency: Sandstorm is a mod designed for Windows that enhances gameplay by introducing new checkpoint scenarios across various vanilla maps. Players can expect a minimum of one checkpoint scenario for each map, alongside an Operations cooperative gamemode, which requires players to locate hidden objectives and defend extraction points to secure victory. The mod provides access to all player classes and fire supports, enriching the cooperative experience and allowing for diverse gameplay strategies.

The mod features multiple scenarios for several maps including PowerPlant, Tideway, Farmhouse, Hideout, Tell, Summit, and Refinery. Each scenario has specific challenges, such as hardcore modes and random elements, enhancing replayability. Additionally, there are options to customize gameplay settings, such as removing boundary fences on maps and modifying enemy counts. While the mod is in development with some known issues regarding localization and player class availability, it offers a robust and engaging experience for fans of the game.