Here is everything I know:
Twitter/YT user
@DeepGamesRes aka
nekorun is doing things with PC version currently, neat stuff like spawning and despawning eileen, zooming out for a "helicopter view," etc.
Ro is using PS2 version with zoom codes and ripping whole areas from the PC version for better views (spiral staircase, etc)
I am using both versions, PS2 version with zoom code and code to move Henry right/left/back/forward, as well as doing things with the alpha channels in the PC version.
Here's an example of the gameshark code to move henry, but it's in first person view in the apartment and I have moved him outside of the apartment to view the floating head from the other side:
More/better pics and videos of that
here. I am also doing a camhacked full playthrough
here
I have a Gameshark and a Code Breaker, I also have put the codes in RAW format here. There are programs(omnivconvert) that can switch these to whatever cheat device you want to use. R2 or L2 plus a direction will enable zooming, etc.
Cheat codes for PS2 version:
// walk through walls
D1F12EC2 0000FEEF
30200014 0045a58A
D1F12EC2 0000FEBF
30300014 0045a58A
D1F12EC2 0000FEDF
30200014 0045a582
D1F12EC2 0000FE7F
30300014 0045a582
// Henry mostly invincible
2045a74c 00000000
// camera zoom
D1F12EC2 0000FDEF
30200004 0045a1b6
D1F12EC2 0000FDBF
30300004 0045a1b6
//remove some visuals
2045a3c0 0000fde8