diff --git a/src/main/c/Georg/tictactoe.c b/src/main/c/Georg/tictactoe.c
new file mode 100644
index 0000000..fcade80
--- /dev/null
+++ b/src/main/c/Georg/tictactoe.c
@@ -0,0 +1,240 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "tictactoe.h"
+
+void printBoard();
+
+struct ticTacToe GAME;
+
+struct command COMMANDS[MAX_COMMANDS] = {
+        { 1, "\"start menu\" - startet das menu", startMenu},
+        { 2, "\"start game\" - startet das spiel", startGame}
+};
+
+void startTicTacToe(){
+    setbuf(stdout, 0);
+    printf( "%s\n", getWelcomeMessageTicTacToe() );
+    printf( "%s\n\n", getRulesMessageTicTacToe() );
+
+    GAME = createTicTacToe();
+
+    while( GAME.currentState != -1 ){
+        commandFunction command;
+        printf("search command!\n");
+        command = getCommandById( GAME.currentState + 1);
+
+        if( command != NULL)
+            command(0);
+        else{
+            printf("command not found");
+            return;
+        }
+    }
+}
+
+char* getWelcomeMessageTicTacToe(){
+    return "Hallo und willkommen zu unserem TicTacToe Spiel. Anbei die Anleitung:\n";
+}
+
+char* getRulesMessageTicTacToe(){
+    return "Das spiel wird über die Komandozeile gespielt.\n"
+           "Jeder Spielzug ist eine Eingabe in die Konsole. Die enstsprechenden Befehle stehen jeweils unterhalb des Spielfelds.\n"
+           "Um ein Zug zu tätigen musst du \"set x,y\" in die Konsole Eingeben. Die Koordinaten stehen dabei für Zeile und Spalte.\n"
+           "Mit dem Befehl \"start\" startest du das Spiel"
+           "Mit dem Befehl \"rules\" kannst du diese Nachricht erneut aufrufen.";
+}
+
+struct ticTacToe createTicTacToe() {
+    struct ticTacToe newGame;
+    newGame.currentState = 0;
+    return newGame;
+}
+
+int handleCommand( char* input ){
+    if( strcmp(input, "start menu") == 0 ){
+        return 0;
+    }else if( strcmp(input, "start game") == 0 ){
+        return 1;
+    }else{
+        return -1;
+    }
+}
+
+commandFunction getCommandById( int id ){
+    commandFunction result = NULL;
+    size_t arraySize = sizeof(COMMANDS) / sizeof(COMMANDS[0]);
+    for (size_t i = 0; i < arraySize; i++) {
+        //printf( "%s", COMMANDS[i].description );
+        if( COMMANDS[i].id == id ){
+            result = COMMANDS[i].fun;
+            break;
+        }
+    }
+    return result;
+}
+
+char* getUserInput(){
+    static char userInput[MAX_INPUT_LENGTH];
+    printf( ":" );
+    fgets(userInput, sizeof(userInput), stdin);
+
+    size_t len = strlen(userInput);
+    if (len > 0 && userInput[len - 1] == '\n') {
+        userInput[len - 1] = '\0';
+    }
+
+    return userInput;
+}
+
+void initializeBoard( bool board[BORAD_SIZE][BORAD_SIZE] ){
+    for (int i = 0; i < 3; ++i) {
+        for (int j = 0; j < 3; ++j) {
+            board[i][j] = 0;
+        }
+    }
+}
+
+int handleGameInput( char* input ){
+    if( strstr(input, "set") != NULL ){
+        return 1;
+    }else{
+        return -1;
+    }
+}
+
+int startMenu( int code ){
+    if( code == -1 ){ // command test
+        return 1;
+    }
+
+    printf("Welcome to the menu!\n");
+
+    while( GAME.currentState == 0 ){
+        int nextState = handleCommand( getUserInput() );
+
+        if( nextState == -1 ){
+            printf("command not found!");
+        }else{
+            GAME.currentState = nextState;
+        }
+    }
+
+    return 0;
+}
+
+void printBoard(){
+    for( int i = 0; i < BORAD_SIZE*4+1; i++ ){
+        printf("-");
+    }
+    printf("\n");
+
+    for (int i = 0; i < 3; ++i) {
+        printf("| ");
+        for (int j = 0; j < 3; ++j) {
+            if( GAME.board[i][j] == true )
+                printf( "X" );
+            else
+                printf ( " " );
+
+            printf(" | ");
+        }
+        printf( "\n" );
+    }
+
+    for( int i = 0; i < BORAD_SIZE*4+1; i++ ){
+        printf("-");
+    }
+    printf("\n");
+}
+
+int* getMarkerParameters( char* input ){
+    int* array = (int*)malloc(2 * sizeof(int));
+
+    int index = strchr(input, ',') - input;
+    int firstArgument = input[index-1] - '0';
+    int secondArgument = input[index+1] - '0';
+
+    array[0] = firstArgument-1;
+    array[1] = secondArgument-1;
+
+    return array;
+}
+
+void setBoardMarker( bool board[BORAD_SIZE][BORAD_SIZE], int* params ){
+    board[params[0]][params[1]] = 1;
+}
+
+void handleGame(){
+    char* input = getUserInput();
+    int nextState = handleCommand( input );
+
+    // check commands, if no command found return for new Input
+    // gameCommands are saved and processed after this block
+    int gameCommand = -1;
+    if( nextState == -1 ){ // no stateCommand
+        gameCommand = handleGameInput( input );
+        if( gameCommand == -1 ){
+            printf("command not found!");
+            return;
+        }
+    }else{
+        GAME.currentState = nextState;
+        return;
+    }
+
+    // gameCommand processing
+    if( gameCommand == 1 ) { // set marker in field
+        int* params = getMarkerParameters( input );
+        setBoardMarker( GAME.board, params );
+        free(params);
+
+        printBoard();
+
+        if( playerHasWon( GAME.board ) ){
+            printf("\n\nDu hast gewonnwn!\n\n");
+            // start menu
+            GAME.currentState=0;
+        }
+    }
+}
+
+bool playerHasWon( bool board[BORAD_SIZE][BORAD_SIZE]){
+    bool player = 1;
+    // Überprüfe Zeilen und Spalten
+    for (int i = 0; i < 3; i++) {
+        // Überprüfe Zeilen
+        if ((board[i][0] == player && board[i][1] == player && board[i][2] == player) ||
+            // Überprüfe Spalten
+            (board[0][i] == player && board[1][i] == player && board[2][i] == player)) {
+            return true;  // Spieler hat gewonnen
+        }
+    }
+
+    // Überprüfe Diagonalen
+    if ((board[0][0] == player && board[1][1] == player && board[2][2] == player) ||
+        (board[0][2] == player && board[1][1] == player && board[2][0] == player)) {
+        return true;  // Spieler hat gewonnen
+    }
+
+    return false;
+}
+
+int startGame( int code ){
+    if( code == -1 ){ // command test
+        return 1;
+    }
+
+    printf("Welcome to the game!\n");
+    bool board[BORAD_SIZE][BORAD_SIZE];
+    initializeBoard( board );
+
+    printBoard();
+
+    while( GAME.currentState == 1 ){
+        handleGame();
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/src/main/c/Georg/tictactoe.h b/src/main/c/Georg/tictactoe.h
new file mode 100644
index 0000000..efd1d1e
--- /dev/null
+++ b/src/main/c/Georg/tictactoe.h
@@ -0,0 +1,44 @@
+#ifndef TICTACTOE_H
+#define TICTACTOE_H
+
+#include <stdbool.h>
+
+#define MAX_INPUT_LENGTH 20
+#define MAX_COMMANDS 3
+#define BORAD_SIZE 3
+
+struct ticTacToe{
+    int currentState;
+    bool board[BORAD_SIZE][BORAD_SIZE];
+};
+
+// Typdefinition für einen Funktionszeiger
+typedef int (*commandFunction)( int );
+
+struct command{
+    int id;
+    char* description;
+    commandFunction fun;
+};
+
+extern struct ticTacToe GAME;
+extern struct command COMMANDS[MAX_COMMANDS];
+
+
+void startTicTacToe();
+char* getWelcomeMessageTicTacToe(void);
+char* getRulesMessageTicTacToe(void);
+struct ticTacToe createTicTacToe();
+int handleCommand( char* input );
+void initializeBoard( bool board[3][3] );
+int handleGameInput( char* input );
+int* getMarkerParameters();
+void setBoardMarker( bool board[BORAD_SIZE][BORAD_SIZE], int* params );
+bool playerHasWon( bool board[BORAD_SIZE][BORAD_SIZE] );
+
+/* commands */
+commandFunction getCommandById(int id);
+int startMenu( int code );
+int startGame( int code );
+
+#endif //TICTACTOE_H
diff --git a/src/main/c/main.c b/src/main/c/main.c
index cbaccdc..4dc37a9 100644
--- a/src/main/c/main.c
+++ b/src/main/c/main.c
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include "SchereSteinPapier.h"
 #include "hangman.h"
+#include "tictactoe.h"
 
 
 void openInterface();
@@ -33,7 +34,8 @@ void openInterface()
         printf("\n\nHallo und willkommen bei unserer Spielesammlung!!!\n"
                "Du hast folgende Spiele zur Auswahl:\n\n"
                "1: Schere-Stein-Papier\n"
-               "2: Hangman\n");
+               "2: Hangman\n"
+               "3: TicTacToe\n");
         printf("\nBitte waehle die Zahl des entsprechenden Spiels aus, um damit zu starten.\nAm Ende eines Spiels kannst du mit der Taste 0 wieder zurueck zum Hauptmenue kommen.\nIm Hauptmenue beendest du mit der Auswahl 0 das Programm \n\n");
         scanf_s("%d", &selection);
 
@@ -49,10 +51,10 @@ void openInterface()
             case(2):
                 hangman();
                 break;
-                /*case(3):
-                    //Spiel()
+                case(3):
+                    startTicTacToe();
                     break;
-                case(4):
+                /*case(4):
                     //Spiel()
                     break;
                 case(5):
diff --git a/src/test/c/Georg/test_tictactoe.c b/src/test/c/Georg/test_tictactoe.c
new file mode 100644
index 0000000..6c2bcb5
--- /dev/null
+++ b/src/test/c/Georg/test_tictactoe.c
@@ -0,0 +1,358 @@
+#include "tictactoe.h"
+#include "unity.h"
+
+void setup(void){
+
+}
+
+void tearDown(void){
+
+}
+
+void test_compileTest_shutBeAllwaysTrue(void){
+    TEST_ASSERT_EQUAL_INT(1,1);
+}
+
+void test_welcome_message(void){
+    // arrange
+    char* expectedMessage = "Hallo und willkommen zu unserem TicTacToe Spiel. Anbei die Anleitung:\n";
+
+    // act
+    char* message = getWelcomeMessageTicTacToe();
+
+    // aassert
+    TEST_ASSERT_EQUAL_STRING(expectedMessage, message);
+}
+
+void test_rules_message(void){
+    // arrange
+    char* expectedMessage = "Das spiel wird über die Komandozeile gespielt.\n"
+                            "Jeder Spielzug ist eine Eingabe in die Konsole. Die enstsprechenden Befehle stehen jeweils unterhalb des Spielfelds.\n"
+                            "Um ein Zug zu tätigen musst du \"set x,y\" in die Konsole Eingeben. Die Koordinaten stehen dabei für Zeile und Spalte.\n"
+                            "Mit dem Befehl \"start\" startest du das Spiel"
+                            "Mit dem Befehl \"rules\" kannst du diese Nachricht erneut aufrufen.";
+
+    // act
+    char* message = getRulesMessageTicTacToe();
+
+    // assert
+    TEST_ASSERT_EQUAL_STRING(expectedMessage, message);
+}
+
+void test_initial_state(void){
+    // arrange
+    struct ticTacToe newGame;
+    int expectedState = 0;
+
+    // act
+    newGame = createTicTacToe();
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( expectedState, newGame.currentState );
+}
+
+void test_command_startGame(void){
+    // arrange
+    int expectedState = 1;
+    char* input = "start game";
+
+    // act
+    int actualState = handleCommand( input );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( expectedState, actualState );
+}
+
+void test_command_startMenu(void){
+    // arrange
+    int expectedState = 0;
+    char* input = "start menu";
+
+    // act
+    int actualState = handleCommand( input );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( expectedState, actualState );
+}
+
+void test_checkCommandlist(void){
+    // arrange
+
+    // act
+
+    size_t arraySize = sizeof(*COMMANDS) / sizeof(COMMANDS[0]);
+    for (size_t i = 0; i < arraySize; i++) {
+        TEST_ASSERT_EQUAL_INT( 1, COMMANDS[i].fun(-1) );
+    }
+}
+
+
+void test_callCommandById(void){
+    // arrange
+
+    // act
+    commandFunction actualCommand = getCommandById( 1 );
+
+    // assert
+    TEST_ASSERT_EQUAL_PTR( startMenu, actualCommand );
+}
+
+void test_callCommandById_startGame(void){
+    // arrange
+
+    // act
+    commandFunction actualCommand = getCommandById( 2);
+
+    // assert
+    TEST_ASSERT_EQUAL_PTR( startGame, actualCommand );
+}
+
+
+void test_initializeBoard(void){
+    // arrange
+    bool expectedBoard[BORAD_SIZE][BORAD_SIZE]={
+            {0,0,0},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    // act
+    bool actualBoard[BORAD_SIZE][BORAD_SIZE];
+    initializeBoard(actualBoard);
+
+    // assert
+    for (size_t i = 0; i < BORAD_SIZE; i++) {
+        for (size_t ii = 0; ii < BORAD_SIZE; ii++) {
+            TEST_ASSERT_EQUAL_INT(expectedBoard[i][ii], actualBoard[i][ii]);
+        }
+    }
+}
+
+void test_handleGameInput(void){
+    // arrange
+    char* teststring = "set 3,4";
+    int expectedCommand = 1;
+
+    // act
+    int actualState = handleGameInput( teststring );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( expectedCommand, actualState );
+}
+
+void test_getMarkerParameters(void){
+    // arrange
+    char* teststring = "set 3,3";
+    int expectedParams[2] = {2, 2};
+
+    // act
+    int* actualParams = getMarkerParameters( teststring );
+
+    // assert
+    for( int i = 0; i < 2; i++ ){
+        TEST_ASSERT_EQUAL_INT( expectedParams[i], actualParams[i] );
+    }
+}
+
+void test_setBoardFields(){
+    // arrange
+    // arrange
+    bool board[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {0,0,0}
+    };
+    int params[2] = {2,2};
+
+    // act
+    setBoardMarker( board, params );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 1, board[2][2] );
+}
+
+void test_checkOnWin_vertically(void){
+    // arrange
+    bool board1[3][3]={
+            {0,0,1},
+            {0,0,1},
+            {0,0,1}
+    };
+
+    bool board2[3][3]={
+            {0,1,0},
+            {0,1,0},
+            {0,1,0}
+    };
+
+    bool board3[3][3]={
+            {1,0,0},
+            {1,0,0},
+            {1,0,0}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 1, result );
+    TEST_ASSERT_EQUAL_INT( 1, result2 );
+    TEST_ASSERT_EQUAL_INT( 1, result3 );
+}
+
+void test_negativ_checkOnWin_horizontally(void){
+    // arrange
+    bool board1[3][3]={
+            {1,0,0},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    bool board2[3][3]={
+            {0,0,0},
+            {0,1,0},
+            {0,0,0}
+    };
+
+    bool board3[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {0,0,1}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 0, result );
+    TEST_ASSERT_EQUAL_INT( 0, result2 );
+    TEST_ASSERT_EQUAL_INT( 0, result3 );
+}
+
+void test_negativ_checkOnWin_horizontally2(void){
+    // arrange
+    bool board1[3][3]={
+            {1,1,0},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    bool board2[3][3]={
+            {0,0,0},
+            {0,1,1},
+            {0,0,0}
+    };
+
+    bool board3[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {1,0,1}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 0, result );
+    TEST_ASSERT_EQUAL_INT( 0, result2 );
+    TEST_ASSERT_EQUAL_INT( 0, result3 );
+}
+
+void test_negativ_checkOnWin_vertically(void){
+    // arrange
+    bool board1[3][3]={
+            {1,0,0},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    bool board2[3][3]={
+            {0,0,0},
+            {1,0,0},
+            {0,0,0}
+    };
+
+    bool board3[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {1,0,0}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 0, result );
+    TEST_ASSERT_EQUAL_INT( 0, result2 );
+    TEST_ASSERT_EQUAL_INT( 0, result3 );
+}
+
+void test_negativ_checkOnWin_vertically2(void){
+    // arrange
+    bool board1[3][3]={
+            {0,1,0},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    bool board2[3][3]={
+            {0,0,0},
+            {0,1,0},
+            {0,0,0}
+    };
+
+    bool board3[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {0,1,0}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 0, result );
+    TEST_ASSERT_EQUAL_INT( 0, result2 );
+    TEST_ASSERT_EQUAL_INT( 0, result3 );
+}
+
+void test_negativ_checkOnWin_vertically3(void){
+    // arrange
+    bool board1[3][3]={
+            {0,0,1},
+            {0,0,0},
+            {0,0,0}
+    };
+
+    bool board2[3][3]={
+            {0,0,0},
+            {0,0,1},
+            {0,0,0}
+    };
+
+    bool board3[3][3]={
+            {0,0,0},
+            {0,0,0},
+            {0,0,1}
+    };
+
+    // act
+    bool result = playerHasWon( board1 );
+    bool result2 = playerHasWon( board2 );
+    bool result3 = playerHasWon( board3 );
+
+    // assert
+    TEST_ASSERT_EQUAL_INT( 0, result );
+    TEST_ASSERT_EQUAL_INT( 0, result2 );
+    TEST_ASSERT_EQUAL_INT( 0, result3 );
+}
\ No newline at end of file