BSOD when playing DOTA 2, happened twice already.

Please check Windows Update for updates and install every update available, it may take a couple of times to get them all.
The 0x116(VIDEO_TDR_FAILURE) is related to the graphics.
Please uninstall everything of AMD using Display Driver Uninstaller and install new drivers from AMD

Code:

*** WARNING: Unable to verify timestamp for atikmpag.sys
*** ERROR: Module load completed but symbols could not be loaded for atikmpag.sys

1: kd> lmvm atikmpag
start             end                 module name
fffff880`06d46000 fffff880`06dee000   atikmpag T (no symbols)           
    Loaded symbol image file: atikmpag.sys
    Image path: \SystemRoot\system32\DRIVERS\atikmpag.sys
    Image name: atikmpag.sys
    Timestamp:        Tue Aug 04 03:42:28 2015 (55C01884)
    CheckSum:         000AF3B6
    ImageSize:        000A8000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

If you are using a program like Ccleaner please stop using it while troubleshooting.
This because programs like Ccleaner remove dump files that are needed to troubleshoot.
Or configure Ccleaner to not remove dump files:


Daemon tools, Alcohol 120% and Power Archiver Pro uses SCSI Pass Through Direct (SPTD), which is a well known cause for BSOD's.
Please remove Daemon Tools and run the SPTD pass through remover.

1. Uninstall Daemon Tools
2. Download the SPTD standalone installer and follow these steps:
   
   • Double click the executable to open it
   • Click on the button shown below

If the button is grayed out, like in the image, there is no more SPTD installation on your system, and you can close the window.

Please check inside your case for any dust and remove it if there is any.
Please check if the GPU is properly seated, reseat if necessary.
Please note the temperatures of the GPU when idle and under load.

Diagnostic test

 GPU TEST

Run Furmark to test your GPU. Furmark tutorial

   Note

Run Furmark for around 30 minutes

   Warning

Your GPU temperatures will rise quickly while Furmark is running. Keep a keen eye on them and abort the test if temperatures rise too high

Please fill in your system specs

Please follow this tutorial and download the tool. The tool will give you detailed information about your system specs, please fill in your system specs more completely including PSU and cooling system.
How to fill in your system specs:

No dust and GPU is properly seated?

May I ask exactly what power supply you are using.