A Score-Driven Singleplayer "Horde" Mode for Crysis 2.
Simply Drag & Drop the 'Spear' folder inside the Crysis 2 'Mods' folder located in "C:\Program Files (x86)\Electronic Arts\Crytek\Crysis 2\Mods" by default.
From the main menu in-game, choose Spear from the mod list. From there, Choose "Mod Campaign" and the desired level you wish to play.
This is the very first Spear release. It contains 6 challenges and 1 map.