The in-game settings menu in Soldat is called "Options"

Options Menu

Respawn Time:

Normal Respawn: Time, in seconds, that you remain dead until your next respawn. Used in Deathmatch, Pointmatch and Rambomatch.
Maximum Time in Team Games: In team games (Teammatch, Capture the Flag, Infiltration) the re-spawn system is called "Wave Respawn". During the game there is set a global re-spawn timer for all players. It's cycle depends on the number of players in the game. When it goes to zero everybody that have been killed before - re-spawn and the timer starts again. For example: When there is 20 players (10 in each team) the timer will reach zero every 40 seconds. Every 40 seconds everyone that died in that time will re-spawn. Maximum Time in Team Games is used so that this time isn't too long, it shortens it to the value you set.
Bonuses: Option to turn off bonuses.
Frequency: Frequency of special bonuses appearing. 0 - never... 5 - lots.
Weapons: Option to turn off weapons.
Maximum Grenades: The maximum amount of grenades you can carry. It is also the number of grenades you pick-up in the boxes. On respawn you get half of this amount.
Friendly Fire: If checked you can kill your teammates. Not recommended in internet games.
Bullet Time: When all players are nearby (on one screen) and someone is killed the game goes into bullet time mode which is a cinematic slow motion effect.
Mouse Sensitivity: The sensitivity of mouse cursor movement (can be also modified during a game with CTRL+ALT+[NUM+/-] ).

Connection: The type of network game you want to play (LAN/Internet).
Maximum Players: Maximum number of players that can join your server.
Register in Lobby Servers: When you start a server it can register in lobby servers so people can find it in the JOIN GAME servers browser.
Game Name: The name of your game server. It will be shown in the servers search.
Game Password: Your game servers password. Only players that know it can join.
Balance Teams: Players that join server will be forced to join the team with less players. Works in CTF and Infiltration.

Interface Style: You can change the style of the game interface. Interface Style changes the graphics, cursor, position of statistics and more.
Player Indicator: If it's on you will see a little arrow above your player, so you know which one is yours.
Sniper Line: Draws a line between the player and the cursor which helps aiming on far distances.

Sound Volume: The sound volume in percents. Also affects the music player volume.
Music Volume: The volume of the Game Music in percents.
Explosion Effect: The effect that happens when something explodes near your player (you become deaf for a few seconds and hear a whistle sound).
Distant Battle: Turns on/off distant battle sounds.
Game Music: Original game music that can be played during the game.

Start Game Menu

Kill Limit or Point Limit: When a players Kills or Points reach this number the round ends. In Teammatch the team score must reach it.
Capture Limit: Flag captures limit in Capture the Flag mode.
Time Limit: Amount of time that the round is played in minutes.
Survival Mode:
Realistic Mode:
Loop: Loops the map list. If not checked the game ends after the maps are finished.
Random Bots: The number of random bots that will play the game. In team games this option is next to the team name.

Player Name: Choose a nickname for your Soldat profile.
Player Colors: Color for the Shirt, Pants, Hair, Jet Flames's of the character
Skin: Skin color of the Soldat character
Hair: Hairstyle of the Soldat charachter
Headgear: Helmet, Hat, None
Chain Style: None, Dog Tags, Gold
Secondary Weapon: Choose your default secondary weapon
Force Background Color: Allows picking a solid/gradient background color to your choice
Control: Shows adjustable game controls (Read also: Default Controls)

Non-standard options are available in the SOLDAT.INI file.