mgreed

This is a bit off-topic, but I thought I'd show that hex editing UPKs can bear fruit. This is something I was working on a couple weeks ago for a different UE game using the exact same methods we're looking at here: ( If you haven't played BL2, that video might not mean anything ). I'd hoped to play around more with XCOM, but I'm getting some dental surgery done tomorrow and I plan on being doped up the rest of the week.

Oh man, I'm so sorry. I figured this out last week with a different game and didn't think to include it in my post. Maybe if i came back more often, I could be a little more help... Also, I'm embarrassed I didn't think to try the decompressed file's hash. great GD work

Ok, BAD NEWS on modifying the UPKs: It checks for a SHA-1 hash match for a huge list of files. You can see the list and the hashes expected using resource editor. Its the 1030 in 1010. The hashes there don't match what I get when I generate hashes for the original, unedited files. I don't know if they are seeded or encrypted or... whatever. I really don't know much about that sort of thing. My best guess would be that someone would have to patch the hash checks out of the main exe. Oh, and if you want to verify, you don't have to modify the UPK. Just use a hex editor to change a byte of the hash listed for one of the files in the list. I tried with XcomStrategyGame.upk. then check the logs under your /USERNAME/My Games/blahblahblah directory Edit: Sad my first post is bad news :(