There is a total of 6 game modes you have to win atleast one match in each.
Team Instant action - Unlocked at rank 1. This gamemode is basicly a 6v6 team deathmatch the first team to reach a total combined kills of 50 or the most kills at the end of the time limit is the winner.
Instant Action - Unlocked at rank 1. A free for all gametype with 12 players first to 25 kills wins.
Crash Site - Unlocked at rank 6. Objective game mode 6v6, Secure the alien drop pod and hold. Earn points by holding (standing next to the drop pod) the longest first to 150 points wins.
Capture the relay - Unlocked at rank 12. Objective game mode 6v6. Basicly a capture the flag game mode , grab enemy relay and bring it back to your base to score. Team with the most captures wins the match.
Assault - Unlocked at rank 18. Objective game mode with only one life per a player 6v6. Two sides one attacking and one defending. Team attacking must infiltrate enemy teams bases and download data from points a,b,c,d, and e. (less points depending on amount of people on teams) Defending team must stop attacking team from dowloading 100% of the data or kill entire enemy team. Attacking team must kill all defending team or dowload 100% of the data.
Extraction - Unlocked at rank 22. Attacking team must take and capture Two alien bio ticks. Defending team must protect the two ticks from the attacking team. Attacking team wins by captureing both ticks and defending team wins by stopping the attacking team.