[Ejziponken]

This works with Deathmatch Advanced. Add the times and mode names from deathmatch.ini (not simple).

#pragma semicolon 1

#define DEBUG
#include <sourcemod>

public void OnMapStart()
{
    CreateTimer(300.0, Timer_Callback, _, TIMER_FLAG_NO_MAPCHANGE);
}

chosen = 0;

public Action Timer_Callback(Handle timer)
{

    if(chosen == 0)
        ServerCommand("dm_load \"Game Modes\" \"Ak Colt\" equip");
        CreateTimer(INSERTSECONDSHERE.0, Timer_Callback, _, TIMER_FLAG_NO_MAPCHANGE);
    else if(chosen == 1)
        ServerCommand("dm_load \"Game Modes\" \"Pistols\" equip");
        CreateTimer(INSERTSECONDSHERE.0, Timer_Callback, _, TIMER_FLAG_NO_MAPCHANGE);
    else if(chosen == 2)
        ServerCommand("dm_load \"Game Modes\" \"Scout knives\" equip");
        CreateTimer(INSERTSECONDSHERE.0, Timer_Callback, _, TIMER_FLAG_NO_MAPCHANGE);
    else if(chosen == 3)
        ServerCommand("dm_load \"Game Modes\" \"SMGs\" equip");
        CreateTimer(INSERTSECONDSHERE.0, Timer_Callback, _, TIMER_FLAG_NO_MAPCHANGE);

    if(chosen == 3)
        chosen = 0;

    chosen++;
    return Plugin_Handled;
}