Game:

Orcs Must Die! Unchained (2017)

Duration: 6:42

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The Challenge is pretty simple to understand, as the description says it all - groups of enemies will double in size with every wave. It's not too bad with Zoey, but I can imagine that the other Heroes can do fairly well if you want to use them instead.

I remember doing this Challenge in previous patches, and it was significantly more difficult. The fact that they patched the game to allow you to place down more Guardians make this Challenge much more manageable.

So prioritize that first - Place down as many Guardians as you can with your initial Coin, then you can use the rest of what you have left to set up a long line of Tar in front of the Rift, on that makeshift bridge (similar to what I did in the Gotta Go Fast! Weekly Challenge).

As you gain more Coin, continue to prioritize placing new Guardians until all of the spots are filled. At that point, you can use whatever traps you wish, but I opted to simply use more Tar and place a bunch of Arrow Walls in various places.

It may be important to note the makeup of each gate though; the west gate will have Fire Fiends, the north gate will have Gnoll Grenadiers, and the east gate will have Armored Ogres. With this in mind, obviously you don't want to use Flip Traps in the east, but anything else should be fine, as the Guardians will do the majority of the work.

In terms of strategy, I personally went after the north first, since the Gnoll Grenadiers are probably the biggest threat to your Guardians, and are fairly easy to kill. At that point, you can make your own judgement call about which of the other gates you want to go for; there are more Fire Fiends than Ogres, and they move faster, but Ogres have more HP and deal more damage to your Guardians. So you just have to make a decision about what to clear first.

The first few waves shouldn't really give you any problems, but the 4th is when the numbers become decently significant. If your worried about things getting to close to the Rift, back up and retreat to that line of Tar on the bridge, and begin to pick off what gets through.

I would highly recommend saving Unchained for the last wave, as you'll see a ton of minions, and there's a good chance a few of your Guardians have taken a lot of damage, meaning they won't survive long. Again, just retreat to the Rift, wait until all of the lanes merge somewhat, and use Unchained to try to clear as much as you can.

I did find the Par Time to be fairly forgiving, as I managed it with Zoey on the first attempt, with just over a minute to spare.

Upgrades: The usual of Chapter 3: Mastering The Schools (Level 2); Chapter 5: Training Familiars (Level 4); and Chapter 9: Death and Chaos (Level 7).

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