Orcs Must Die! Unchained (PS4) - Fun With Physics Weekly Challenge Guide (5 Star with Zoey)
This is a pretty tough Challenge, as you only get access to physics traps. The main issue isn't using physics traps, but rather, they throw minions at you that won't be affected by them (Ogres and Kobolds).
I did manage a 5 Star with Zoey, but with some practice. I think Gabriella would be the tough to do this with, and with Ivy it might be difficult as well. Zoey is kind of the "happy medium" between the two; she can have a fast attack speed like Ivy (for the Kobolds), but she also deals more damage than Ivy.
I would recommend focusing on the west gate, as it has the shorter path to the Rift, and it mostly gets the tougher groups of minions. I set up 2 Spike Walls near the west gate (make sure they point the right way), then put 3 Flip Traps past the Guardian area. On the east gate, I spend the rest of the coin placing down Push Traps; try to ensure that the lower Push Traps are pushing minions into the lava (and not the pillars).
Wave 1 - Stay at the west gate, as it'll be broken down first. Try to clear as much as you can, but keep an eye on the minions from the east; as soon as they start approaching the Guardian, head over there to help him out.
Wave 2 - I start by placing as many Flip Traps as I can at the east gate, (don't point them towards the teleport, they can be flipped into it). Once the wave starts, just repeat what you did on the first wave. You will get Kobolds on this wave, but there are not too many of them.
Wave 3 - I add a Spike Wall and a Haymaker near the bend at the east gate. This wave is much more like the first two, and there's not really any minions to note. Just go back to clearing the west first, then clean up the east.
Wave 4 - I add my first Haymaker to the ceiling near the Rift (on the west side), to hopefully catch any minions that get close to the Rift. The east gate should mostly be okay with what it has, so I would recommend focusing on putting traps on the west side as much as possible from now on. There's a good amount of Ogres on the west side during this wave, so if you're playing Zoey, feel free to use Feebee's Wrath if you want (it's pretty good to use it near the Guardian, as they'll cluster more). I add 2 more Haymakers near the one I placed around the Rift earlier.
Wave 5 - Toughest wave to get through, and it will more than likely cost you Rift points. The group from the west gate consists entirely of Kobolds, and to make matters worse, they trickle through only a few at a time. Do not assume that any of your traps will work on them, because they more than likely won't. In the video, I use Unchained and Feebee's Wrath just in some attempt to try to clear them (with mixed results). Unfortunately, the minions from the east will also survive the majority of your traps, so you will more than likely need to retreat to the Rift and try to pick them all off as the two lanes merge right before the Rift. This is very hard to do, and I will admit I was stressing quite a bit in the video during this wave.
Wave 6 - If you managed to get through wave 5 with your Rift points intact, this wave should give you less problems. It's kind of like a repeat of wave 4 (Ogres from the west), just with more minions. You may need to fall back to the Rift though, as chances are more minions will get past the Guardian in the east.
Upgrades: Chapter 3: Mastering The Schools (Level 2), Chapter 5: Training Familiars (Level 4), Chapter 9: Death and Chaos (Level 7).
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