Not sure if others are having problems with this achievement:
Do not allow Warp Prisms to warp in any units in “The Infinite Cycle” mission on Normal difficulty.
I have run it many times and prevented all warp prisms from completing their warps. So far I have come across the following:
< Phase 1 >
During the defensive portion at the end, there are 2 sets of warps (not sure if it’s via pylon or warp prism but I took no chances). So first set are warp in zealots, second set are warp in colossus. There were the initial set of zealots (which you are already engaged in) and also stalkers which blinked in from the right. However, I’m not sure if the 2nd set of stalkers were warped or blinked in from the right (I’m leaning more towards blink).
< Phase 2 >
This one is abit of a headache because there are 4 quick waves of prisms (1 to the left of the beam; 2 above it; and 1 below it). After which, while passing through, you should encounter 2 more prisms where the protoss is fighting against the constructs but they don’t warp anything. At the end of the phase during the defensive portion, there are a 2 warp prisms that fly in but I didn’t see them warp anything (I’m assuming I’m too fast for it).
That should be pretty much it.
If anyone know of any other warps, please share as well. It’s getting a tad bit frustrating.