Just a small patch implementing achievement stacking.
Full Patch Notes
Unlocking a difficulty-tied achievement will also unlock the lower difficulty equivalent achievements. Reaching level 4 on any non-custom difficulty will also unlock the "Training Wheels Off" achievement (the one you get for completing Practice Mode).
The game will check at startup if any lower difficulty achievements should be unlocked retroactively. This happens before the Steam Overlay is fully initialized, so you likely won't see the pop-up notifications. However, the newly unlocked achievements will appear on your profile/game stats.
Dead Hand now has Trading Cards / Badges and some Point Shop items, in case you missed them.
Cheers!