Try starting the game with "-nosplash" parameter.

RMB-click on the game in Steam and go to Properties>Set Launch Options...

We need dxdiag and files from this folder to solve your problem. C:\Users\<Name>\AppData\Local\Arma 3 Alpha\

Can you upload it somewhere in winrar package please?
If package is smaller than 5,000k, so you can attach it here. Thank you.

Ok Hanz, files uploaded.

Also, @Tourorist, I am talking about before the Fullscreen splash screen.
Its the small loading bar you see when first starting the game.

I will also make a note that it usually crashes right at the first step.
(Core System).

My bad, misunderstood that as an in-game loading screen. Anyhow, hope this gets fixed soon.

have you tried starting the game with -nobenchmark?

Just tried that choseh, crashed at "Loading Core Configs".
Must be a different issue.

I am going to try moving my A3 folder from app data, then verifying files. See if there is some corruption or something.

Ok, so deleting the Arma 3 Appdata folder seems to stop it from crashing.
I just have to delete it every time I start the game -_-

Also adding this to my ticket. It works as a general workaround:

Ok, this works for me everytime.
Once you have done it once, you may have to revisit steps 1 through 3 if it crashes again.
I literally just played a 4 hour session of Wasteland without and issue as well.
Before I couldn't play for even 30 min.
Also this seems to improve the speed of the server browser, as well as other parts of the game.

1. Turn on Hidden Files and Folders in Windows
2. Navigate to: C:\Users\*username*\AppData\Local
3. Delete the folder labeled: "Arma 3 Alpha"
4. Open Steam
5. Right Click Arma 3 Alpha
6. Click Properties
7. Click Local Files
8. Click Browse Local Files.
9. Right click Arma3.exe
10. Click Properties
11. Click Compatibility
12. Check the "Run as Administrator" box
13. Click OK
14. Run Arma 3 from steam, or from exe.

Supposedly fixed. Open a new ticket with new dumps if crashes occur.