Your server starts in Clan Arena. Each game mode brings its own rules and map rotation.

Changing The Game Mode

Game Mode	What it is
Clan Arena	Teams start with every weapon and full armor; the last team standing wins the round.
Deathmatch	Everyone for themselves; players drop their weapon and powerups when fragged.
Free For All	Everyone for themselves with item pickups.
Team Deathmatch	Two teams compete for the most frags.
Duel	One on one; other players wait in the queue.
Duel Arena	Round based one on one with full loadouts.
Capture The Flag	Take the enemy flag back to your base.
CTF Tactics	Capture The Flag with player classes, turrets and revives.
Bomb and Defuse	One team plants the bomb, the other defends or defuses it.
Headhunt	Deathmatch with a tagged target that earns bonus points.
Race	Race through maps against the clock.

The server starts on the first map of the mode unless you choose a Start Map.

How To Change The Game Mode On Your Warfork Server