gistfile1.cs

         var enemyNames = Enemys.GetComponentsInChildren<Enemy>()
                                .Where(x => x.HP > 0)
                                .Where(x =>
                                {
                                    var enemyPos = x.transform.position;
                                    var playerPos = player.transform.position;
                                    return Vector3.Distance(enemyPos, playerPos) <= 10;
                                })
                                .Where(x =>
                                {
                                    var playerPos = player.transform.position;
                                    var enemyPos = x.transform.position;
                                    var playerDirection = player.transform.forward;
                                    var toEnemyDirection = enemyPos - playerPos;

                                    var angle = Vector3.Angle(playerDirection, toEnemyDirection);
                                    return angle < 30.0f;
                                })
                                .OrderBy(x =>{
                                    var enemyPos = x.transform.position;
                                    var playerPos = player.transform.position;
                                    return Vector3.Distance(enemyPos, playerPos);
                                })
                                .Select(x => x.ScreenName);
                                
                                
        var enemyNames = Enemys.GetComponentsInChildren<Enemy>()
            .Where(x => x.HP > 0)
            .Where(x => Vector3.Distance(x.transform.position, player.transform.position) <= 10)
            .Where(x => Vector3.Angle(player.transform.forward,
                                      x.transform.position - player.transform.position) < 30.0f)
            .OrderBy(x => Vector3.Distance(x.transform.position, player.transform.position))
            .Select(x => x.ScreenName);