Level 2-10-1 is the fifth and the final Advanced level of Ancient Egypt in Plants vs. Zombies Online. It is a "Pharaoh Boss" level, in which the player will have a boss battle with the Sphinx and get their points increased for every zombie killed and every giant fireball summoned by the boss extinguished by Iceberg Lettuce. The player will be ranked with other online players by points and the 1st, 2nd and 3rd ranked players will get huge prizes.
- The level is likely impossible. The Sphinx this time summons ten zombies at a time, along with massive amount of zombies enter from the start of the lawn. The player also lacks Plant Food. Unless the player can set a strong defense with the given plants, his/her entire defense will be wrecked down before the player can even reach the first flag.
- Note: In order to beat this impossible level, obtaining gold gems for extra lawn mowers is neccessary.
- Plant Wall-nuts in front of your defenses. This will keep your plant army safe.
- Use Plant Food on Repeaters/Bloomerangs to clear the whole lane of zombies, on Cabbage-pult if there are tough zombies everywhere, or on Bonk Choy to clear a horde of zombies in a 3x3 area.
- Never waste Plant Food. If one appears, and you still have Plant Food, use one if it is needed, and then pick up the additional Plant Food.
- Note that there are lawn mowers which will kill the zombies when they're too close.
- Always try to stall dangerous zombies, such as Explorer Zombies or Pharaoh Zombies. Use Wall-nuts and Iceberg Lettuces to stop them, then focus your attack on them.
- The Sphinx can summon a lot of zombies in front of it. Click them all to destroy them before the summoning sequence is finished. Note that you cannot do this and set up your defense as quickly enough if your computer is lagging.
- Use Grave Buster to bust as many graves as you can to save space for planting.
- You can only damage the Sphinx once it has come to the final wave. The Sphinx will then move into different lanes. Focus your attack on the Sphinx while clearing out the other zombies.
- If you have a Repeater and a Plant Food, use the Plant Food on it. This can deal a lot of damage to the Sphinx during the final wave.
- When the final wave has come, it is now able to release a fireball that will burn down all of your defenses. This happens right after its zombie summoning. STOP THE ATTACK IMMEDIATELY by placing an Iceberg Lettuce right in front of it (Note that the Iceberg Lettuce is not given very often this time, so save it in the first waves). Then take care of the summoned zombies, as they are not much a dangerous threat.