I'm encoutering constant freezes in endless challenge 2.
Amusingly the first time i tried it worked completly flawless and i managed to get to wave 110 or something. Each attempt after that resulted in a game freeze sooner or later. When it's frozen i still can open and close the options menu but after the first time it takes forever.
I've played a little bit with the options(stuff like reducing all the grafics) so far nothing had any effect. Somewhen around wave 60 it freezes.

by the way it's obviously not looping the cpu load actually drops.

Edit:
Ok, the freezes aren't limited to endless 2. I can pause and unpause. While paused the animations work(spawn point fading) and sometimes repeated pausing/unpausing causes the game to move one frame by frame as it seems. Once it even fixed the problem.

Realm of the Wizard on extreme mode does it to me. Sooner or later it just stops being able to display what's going on, frame/sec goes down.

Pausing/unpausing does have an effect sometimes and menu is accessible, but sometimes you can just never leave the menu again (or I just didn't have the patience tpo wait long enough).

So how do we post a bug report?

It freezes on any long map now. May have something to do with the number of units killed or something. Now I'm stuck at a map where we have to kill Zelemir (must be close to the end or smth).

Looking at the game's other forum, it seems to be an issue with healers. I was having the same problem, and once I limited the healers to just healing the game didn't freeze at all, made it up to level 44 before dying where it had been freezing at level 26. Other reported simply not using healers or recalling them from battle also worked or unfroze the game. It also looks like there might be a patch that might fix this but I didn't spend much time trying to figure that out.

edit: just to clarify I only made it up to level 44 before dying, it didn't freeze at all after limiting the healers.

I'll try to play without healers attackign and get back to you.

Yea it seems to solve it, game isn't hanging up anymore.

Where is that other forum?

Seems to do the job. thank you.

http://www.defendersquest.com/theforum/

We're pushing patch version 1.0.72 live later today. This fixes this and various other issues.