[[nl]daplayer]

pawn Код:

new pOnlineTime[MAX_PLAYERS];

public OnPlayerConnect(playerid)
{
  pOnlineTime[playerid] = GetTickCount();
  // Maybe do some loading when the play logs in.
  return 1;
}

public OnPlayerDisconnect(playerid, reason)
{
  new time = pOnlineTime[playerid] - GetTickCount();
  // time = the time the player was online in milliseconds.
  // Do saving stuff here.
  return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
  if (!strcmp(cmdtext, "/command") && GetPlayingHours(playerid) >= 100)
  {
    SendClientMessage(playerid, 0x000000FF, "You have reached 100 hours!!");
    return 1;
  }
  return 1;
}

stock GetPlayingHours(playerid)
{
   return (pOnlineTime[playerid] - GetTickCount()) / 60 / 60);
}

Not compiled and tested or anything so there could be some typos

Use GetPlayingHours to get the total playing hours the person is playing.