The Sandpit.rar file you have requested: Maps Levels Missions / Deathmatch / Sandpit - 19.24mb is not available. Perhaps try browsing all files for the game Serious Sam: The Second Encounter and upload any files you want to share or are missing. This is the only information we could locate:
My own version of Serious Sam HD: The First Encounter's Flood deathmatch map. This isfor original Second Encounter. Desert style deathmatch map for Second Encounter.