The NSSP.rar file you have requested: Modifications / Northern Strike / Clients / Battlefield 2142 Mod - Northern Strike: Single Player v2.0 - 558.35mb is not available. Perhaps try browsing all files for the game Battlefield 2142 and upload any files you want to share or are missing. This is the only information we could locate:
Northern Strike: Single Player allows you play Northern Strike booster maps in single player and co-op modes. All maps have added no vehicles and assault lines.