▁the ▁game ▁has ▁been ▁made ▁un available ▁for ▁purchase ▁from ▁Ste am . ▁ ▁Game play ▁There ▁are ▁four ▁game ▁modes , ▁In fil tr ation , ▁Retrie val , ▁Team ▁Death match ▁and ▁Con voy . ▁In fil tr ation ▁is ▁an ▁objective ▁capture ▁mode ▁similar ▁to ▁those ▁found ▁in ▁many ▁other ▁first ▁person ▁shoot er ▁games , ▁where ▁certain ▁points ▁are ▁captured ▁and ▁the ▁team ▁with ▁the ▁most ▁points ▁wins . ▁Retrie val ▁involves ▁the ▁teams ▁attempting ▁to ▁capture ▁an ▁object . ▁Team ▁Death match ▁is ▁a ▁simple ▁format ▁where ▁there ▁is ▁a ▁time ▁minute ▁and ▁the ▁team ▁with ▁the ▁most ▁k ills ▁at ▁the ▁end ▁wins . ▁Finally ▁con voy ▁involves ▁one ▁team ▁esc ort ing ▁a ▁con voy ▁to ▁a ▁check point ▁and ▁the ▁other ▁attempting ▁to ▁prevent ▁it ▁getting ▁there . ▁The ▁con voy ▁itself ▁is ▁ind est ruct ible , ▁but ▁it ▁cannot ▁move ▁without ▁an ▁esc ort . ▁ ▁There ▁are ▁five ▁classes : ▁R if le man , ▁Gun ner , ▁S ni per , ▁Support ▁and ▁Re con . ▁The ▁R if le man ▁represents ▁" standard " ▁soldiers , ▁using ▁automatic ▁rif les ▁and ▁similar ▁weapons ▁and ▁special ising ▁in ▁mid - range ▁combat . ▁The ▁Gun ner ▁class ▁uses ▁mach in eg uns ▁such ▁as ▁the ▁M 6 0 , ▁and ▁special ises ▁in ▁supp ression ▁using ▁high ▁damage , ▁high ▁rate - of - fire , ▁but ▁low ▁accuracy ▁weapons . ▁The ▁S ni per ▁class ▁uses ▁scop ed ▁rif les