There are currently 5 planets on Zone, each with a different way to play.
Spar Planet - Sparring Arena

Players pit themselves against each other to find out who is the best! To enter a sparring room, you must touch the door and you will be placed next in line. The server will notify you when you are next in the sparring room.
Gaining a kill in the sparring room increases what is called a "Spar Rating", this is put up on the leaderboard to show who has the highest rating. But when you die, you lose a lot of rating! So be careful. Also, if you want to leave the sparring room and stop fighting, you just walk up to the door and your out. But it will block anybody running away from a fight!
If your new to Zone a helpful sparring bot is in one of the rooms, where you can practice with what guns you feel most comfortable with. If the sparring bot kills you, do not worry, it won't add to your deaths, and vice versa.
Wild Cross - Deathmatch

This planet is a last man standing type of play. Enter the center room of the dropship and when the timer reaches 0 it will warp you into the battlefield! You kill everyone in sight, in whatever way possible. Use barrels to blow them up or slow them down with slime!
There is a time limit
during the game, so it's best to kill quickly, to add to the pace. The winner will receive money and the statue in the central room will morph to his figure.
Events can be hosted here by the Events Team for special prizes, such as money, explosives, Red Pistols, Blue Pistols and Reapers! The members of the Events Team that are able to host these events are:
Huwajux
Vulcan
MisterMastermind
Jkool666
Gerami
Guild Wars - Team Elimination

Enter either Team_Alpha or Team_Beta and get ready to destroy the opposing team! There is a new class called the engineer, which is the only one able to ride Mechs.
Once you die in a round on this planet, you can't return till the next round, so play wisely. There are new lava caves where only melee weapons are equipable, so start practicing with those plasmasabres!
Events can also be hosted here, turning either team into a certain 'guild only' team. Where "Guild Wars" can take place to see which is better!
KOTH - King Of The Hill
Enter a team and keep posession of the center area of the map! You have to keep it for 4 minutes without the other team gaining access to it!
Depending on its playercount, there will be only 2 teams normally. But if there are 30 people, 3 teams. 40 people, 4 teams.
Events can also be hosted on this planet using different guilds to see which guild has the most persistance.
Iricia - Domination

Join either Storm_Riders or Sweep_Fleet and try to gain all 5 bases to win the game! Use proxmines to protect each base and blow up whoever tries to take one.
Inside each teams HQ bunker, there are 2 teleports. 1 goes back to the dropship and the other goes to base1 when their team has posession of that base. It can be used for quick escapes if things get a bit too much.
That's it! Now have fun on the different planets to test your skills!