 "The Crossing" was to be a first-person shooter which supported a narrative-driven single-player game, but with the player's opponents replaced by human-controlled agents via a multi-player system, an approach called "crossplayer" by Arkane.In this single-player mode, the single player would work through a game level amid the conflict of a team-based deathmatch game, with teams assigned to either protect or assassinate the character controlled by the single player.The game also was to include a team-based multiplayer mode called skirmish, which is also incorporated into the single-player campaign, where the main player might try to avoid the skirmish.