The game's "Route" system allows each mission to be played through from two different character perspectives. During the first part of the mission, players must assist the second character, which affects their performance in the second part of the mission. This mechanic rewards good assistance with cover fire or health bonuses later on.
For added replayability, WinBack 2: Project Poseidon features a multiplayer mode that supports up to four players, including deathmatch and sniper battles. Players can also choose from bots if they're playing with fewer than four people.