There are a lot of changes compared to the last ObHack release:
- ObHack now has real secrets; you'll have to pay attention to find the secret areas
- Every level now has at least one secret
- New option: "Switches"; this allows you to have all puzzles be key puzzles, switch puzzles, or a mixture of both
- New game type: "Doom 1 Mr. Chris"; this is a version of Doom1 with some of Mr. Chris' changes applied to it
- RNG seeds can be up to 20 letters long now
