1. Enable ssh: ip addr , passwd , systemctl start sshd , ssh into VM
2. Partition drive:

   cfdisk /dev/sda

   (DOS table, one partition, bootable.)

3. Format:

   mkfs.ext4 /dev/sda1

4. Mount root:

   mount /dev/sda1 /mnt

5. Install:

   pacstrap /mnt base base-devel htop tmux sudo wget grub elinks

6. Generate fstab:

   genfstab -Up /mnt >> /mnt/etc/fstab

7. chroot:

   arch-chroot /mnt /bin/bash

8. set locale:

   echo en_US.UTF-8 UTF-8 > /etc/locale.gen ; locale-gen

9. Set time zone

   ln -s /usr/share/zoneinfo/America/New_York /etc/localtime

10. set hostname:

    echo hostname > /etc/hostname

    (You should probably add it to /etc/hosts too)

11. create netctl profile:

    echo -e "Interface=ens32\nConnection=ethernet\nIP=static\nAddress='10.0.0.15/8'\nGateway='10.0.0.1'\nDNS='10.0.0.1'" > /etc/netctl/enet

12. if DHCP is required, edit /etc/netctl/examples/ethernet-dhcp instead
13. enable netctl:

    systemctl enable netctl

14. enable profile:

    netctl enable enet

15. set root passwd
16. create user

    useradd -m -G wheel -s /bin/bash user

17. set user passwd
18. configure sudo

     echo %wheel ALL=\(ALL\) ALL >> /etc/sudoers

19. install bootloader

    grub-install --target=i386-pc /dev/sda

    grub-mkconfig -o /boot/grub/grub.cfg

20. enable ssh:

    systemctl enable sshd

21. enable vmtools:

    systemctl enable vmtoolsd

22. exit chroot
23. umount /mnt
24. sync
25. reboot & disconnect ISO

As with everything else linux related, there are many different ways to go about this. Listed below are a few alternatives to the above steps.

A very quick way to create one partition with fdisk can be to echo keystrokes to it:

echo -e "o\nn\n\n\n\n\nw" | fdisk /dev/sda

This can be done even faster when combined directly with mkfs & mounting:

echo -e "o\nn\n\n\n\n\nw" | fdisk /dev/sda; mkfs.btrfs /dev/sda1; mount /dev/sda1 /mnt

Ctrl-K-ing all of the mirrorlist can take some time, and is unnecessary.

echo Server = http:\/\/10.0.0.35\/archlinux\/\$repo\/os\/\$arch > /etc/pacman.d/mirrorlist

Note: This will wipe ALL of the mirrors from the mirrorlist.

If you really wanted to, you could do it all in one fell swoop. I've added in a few extras.

dd if=/dev/zero of=/dev/sda count=100000; echo -e "o\nn\n\n\n\n\nw" | fdisk /dev/sda; mkfs.btrfs /dev/sda1; mount /dev/sda1 /mnt;
echo Server = http:\/\/10.0.0.35\/archlinux\/\$repo\/os\/\$arch > /etc/pacman.d/mirrorlist;
pacstrap /mnt base base-devel syslinux openssh tmux open-vm-tools sudo wget; genfstab -Up /mnt >> /mnt/etc/fstab; 
arch-chroot /mnt /bin/bash; echo en_US.UTF-8 UTF-8 > /etc/locale.gen; locale-gen; ln -s /usr/share/zoneinfo/America/New_York /etc/localtime; 
hwclock --systohc --utc; echo hostname > /etc/hostname; 
echo -e "Interface=ens32\nConnection=ethernet\nIP=static\nAddress='10.0.0.x/8'\nGateway='10.0.0.1'\nDNS='10.0.0.1'" > /etc/netctl/enet; 
netctl enable enet; systemctl enable netctl; systemctl enable vmtoolsd; systemctl enable sshd; useradd -m -G wheel -s /bin/bash user; 
echo %wheel ALL=\(ALL\) ALL >> /etc/sudoers; syslinux-install_update -iam

This does not include setting passwords for root or the new user, or changing /dev/sda3 to /dev/sda1 in syslinux.cfg. Chroot can be exited and /mnt umounted after this is done.