At the beginning of each mission you can choose which of the three protagonists you want to control. Depending on the character you can use different weapons. One is better with guns, the other with handguns, etc. Also, the story changes depending on the course, with which character you are playing.
As far as the gameplay. Sounds neither new nor innovative, entertaining for playfulness should be taken care of. However, this is not like that. The game is marred by the loveless graphics, despite Chrome Engine 5. The levels are carelessly cobbled together, the flow advances to linear and you do not really have the freedom to commit a large area.
The expiry of the missions is relatively equal. Go from A to B, this shoot down everything and collect an item or to consult an objective person. Here go a while two non-player characters at your fingertips, but the constantly annoying with its repetitive chatter, are immortal and ammunition them never goes out. From the AI you have to not only talk. The race rejoice before the shotgun and so exchange of fire is not really a challenge.
About the online mode I can not say because I do not play online. Too bad the first two parts possessed so much play depth, an engrossing story, interesting gameplay and long-term motivation. Again a successor will not live up to its predecessors.