Mysterious Hacks Game (Nerds Only!)

Okay, here is the premise.
You give somebody a random piece of code (in hex, so they don't know what it does). You give instructions on how/where to put it into their game. They rate the results.

I don't really expect a lot of activity, but here goes.

55 68 D0 CC AC 12 68 D0 CC AC 23 E8 40 E3 00 41
89 05 E8 58 41 41 6A 11 6A 22 E8 31 E3 00 41 89
05 19 57 41 41 68 D0 CC AC 23 68 D0 CC 7C 45 E8
1C E3 00 41 89 05 22 57 41 41 6A 22 6A 44 E8 0D
E3 00 41 89 05 53 57 41 41 5D C3 .. .. .. .. ..

put it anywhere in your exe that won't crash everything.
call to it from somewhere.

I was going to do something with flashy lights, but that took too long.

 

Hey now, this looks fun. I tried above code, but it didn't work for me. I got the following when I pasted:

0048BF00     55             PUSH EBP
0048BF01     68 D0CCAC12    PUSH 12ACCCD0
0048BF06     68 D0CCAC23    PUSH 23ACCCD0
0048BF0B     E8 40E30041    CALL 4149A250
0048BF10     8905 E8584141  MOV [414158E8],EAX
0048BF16     6A 11          PUSH 11
0048BF18     6A 22          PUSH 22
0048BF1A     E8 31E30041    CALL 4149A250
0048BF1F     8905 19574141  MOV [41415719],EAX
0048BF25     68 D0CCAC23    PUSH 23ACCCD0
0048BF2A     68 D0CC7C45    PUSH 457CCCD0
0048BF2F     E8 1CE30041    CALL 4149A250
0048BF34     8905 22574141  MOV [41415722],EAX
0048BF3A     6A 22          PUSH 22
0048BF3C     6A 44          PUSH 44
0048BF3E     E8 0DE30041    CALL 4149A250
0048BF43     8905 53574141  MOV [41415753],EAX
0048BF49     5D             POP EBP
0048BF4A     C3             RETN

Which is of course a load of rubbish. So, 0/10 for a crash :[

Here's mine:

55 8B EC 8B 45 08 D1 60 08 D1 60 0C D1 65 10 D1 65 0C 8B 45 14 8B 08 89 0D C4 D4 49 00 8B 50 04
89 15 C8 D4 49 00 8B 48 08 89 0D CC D4 49 00 8B 50 0C 89 15 D0 D4 49 00 8B 45 14 8B 4D 0C 03 48
08 8B 55 14 2B 0A 8B 45 08 3B 48 08 7E 20 8B 4D 14 8B 55 0C 03 51 08 8B 45 14 2B 10 8B 4D 08 2B
51 08 A1 CC D4 49 00 2B C2 A3 CC D4 49 00 8B 4D 08 8B 55 0C 3B 11 7D 1C 8B 45 08 8B 08 2B 4D 0C
03 0D C4 D4 49 00 89 0D C4 D4 49 00 8B 55 08 8B 02 89 45 0C 8B 4D 14 8B 55 10 03 51 0C 8B 45 14
2B 50 04 8B 4D 08 3B 51 0C 7E 23 8B 55 14 8B 45 10 03 42 0C 8B 4D 14 2B 41 04 8B 55 08 2B 42 0C
8B 0D D0 D4 49 00 2B C8 89 0D D0 D4 49 00 8B 55 08 8B 45 10 3B 42 04 7D 1E 8B 4D 08 8B 51 04 2B
55 10 03 15 C8 D4 49 00 89 15 C8 D4 49 00 8B 45 08 8B 48 04 89 4D 10 8B 55 0C 89 15 B4 D4 49 00
8B 45 10 A3 B8 D4 49 00 8B 4D 0C 03 0D CC D4 49 00 2B 0D C4 D4 49 00 89 0D BC D4 49 00 8B 55 10
03 15 D0 D4 49 00 2B 15 C8 D4 49 00 89 15 C0 D4 49 00 8B 0D C4 D4 49 00 0F AF 0D 14 F9 48 00 89
0D C4 D4 49 00 8B 15 C8 D4 49 00 0F AF 15 14 F9 48 00 89 15 C8 D4 49 00 A1 CC D4 49 00 0F AF 05
14 F9 48 00 A3 CC D4 49 00 8B 0D D0 D4 49 00 0F AF 0D 14 F9 48 00 89 0D D0 D4 49 00 6A 00 68 00
80 00 01 68 C4 D4 49 00 8B 55 18 8B 04 95 88 D3 49 00 50 68 B4 D4 49 00 8B 0D 84 D3 49 00 8B 11
A1 84 D3 49 00 50 FF 52 14 8B 45 08 D1 68 08 D1 68 0C D1 6D 10 D1 6D 0C 5D C3 00 01 68 C4 D4 49
00 8B 55 18 8B 04 95 88 D3 49 00 50 68 B4 D4 49 00 8B 0D 84 D3 49 00 8B 11 A1 84 D3 49 00 50 FF
52 14 5D C3

Replace 40c3c0 with this.

 

Actually, this looks like a pretty interesting thread for someone who's experienced in mods and HEX editing. Might get some interesting and funny results. But... I'm not a nerd. I'm sorry but I won't be posting on this thread. But I'll be watching what happens.

 

Is there a faster way to do this than manually?
coz I really dunt feel like writing that all out.
:/



Tho screwing with rendering is fun. I wonder what you made it do....

 

Oh.
Well, in Olly, if you copy all that into the clipboard and then open up the spot, select the segment and then go "Binary paste"
it should work just lickity-split.

 

Ah, thought you could only do that with things copied out of olly.

Well I'll give this an 8/10 for sheer scope.
Makes it hell to play though.

Gimme a sec to make one.

 

Heheheh

0x4224fe: E8 BD 9E FE FF 83 C4 14 8B E5 5D C3 CC CC CC CC
CC CC 55 8B EC 81 EC C8 00 00 00 E9 26 2D 00 00

0x4251d9: E9 87 05 00 00 B8 02 00 00 00 E9 7D 05 00 00 8B
0D E0 5A 4A 00 83 C1 08 89 0D E0 5A 4A 00 E9 AB
00 00 00 8B 15 D8 5A 4A 00 03 15 E0 5A 4A 00 0F
BE 42 01 83 F8 45 75 33 8B 0D D8 5A 4A 00 03 0D
E0 5A 4A 00 0F BE 51 02 83 FA 53 75 1E A1 D8 5A
4A 00 03 05 E0 5A 4A 00 0F BE 48 03 83 F9 43 75
0A B8 02 00 00 00 E9 21 05 00 00 6A 4E 6A 49 6A
57 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
90 90 90 90 90 90 90 90 90 90 90 90 90 68 F0 C9
48 00 8D 95 48 FF FF FF 52 E8 89 BD 05 00 83 C4
14 6A 00 68 08 CA 48 00 8D 85 48 FF FF FF 50 6A
00 FF 15 C4 C1 48 00 33 C0 E9 BE 04 00 00 E9 C0
02 00 00 8B 0D D8 5A 4A 00 03 0D E0 5A 4A 00 0F
BE 11

That's two places, mind. don't you forget it.

 

Are these like Cave Story specific, or just general, or what?

 

CS only, otherwise chaos.

 

Yup. Anyway, 9/10 cuz' I got dominated.

This looks really big but there's only a few changes, I had to rearrange everything to make a bit of space though.

33 C9 89 4D F4 C7 45 FC 58 00 00 00 89 4D F0 C7 45 F8 40 01 00 00 6A 1C 8D 4D F0 51 6A 00 6A 00
68 1C F9 48 00 E8 80 9F 00 00 83 C4 14 C7 45 F4 58 00 00 00 C7 45 FC 7B 00 00 00 A1 8C 9C 49 00
99 2B C2 D1 F8 89 45 F0 C7 45 F8 40 01 00 00 6A 1C 8D 55 F0 52 6A 58 6A 00 68 1C F9 48 00 E8 47
9F 00 00 83 C4 14 C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 6A 58 A1 8C 9C 49 00 99 2B C2 D1 F8 99
B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00 E8 11 9F 00 00 83 C4 14 C7 45 F4 7B
00 00 00 C7 45 FC 92 00 00 00 A1 8C 9C 49 00 C1 E0 03 99 B9 40 01 00 00 F7 F9 89 55 F0 C7 45 F8
40 01 00 00 6A 1C 8D 55 F0 52 6A 7B 6A 00 68 1C F9 48 00 E8 D2 9E 00 00 83 C4 14 C7 45 F0 00 00
00 00 6A 1C 8D 45 F0 50 6A 7B A1 8C 9C 49 00 C1 E0 03 99 B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B
C2 50 68 1C F9 48 00 E8 9E 9E 00 00 83 C4 14 C7 45 F4 92 00 00 00 C7 45 FC B0 00 00 00 A1 8C 9C
49 00 C1 E0 04 99 B9 40 01 00 00 F7 F9 89 55 F0 C7 45 F8 40 01 00 00 6A 1C 8D 55 F0 52 68 92 00
00 00 6A 00 68 1C F9 48 00 E8 5C 9E 00 00 83 C4 14 C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 68 92
00 00 00 A1 8C 9C 49 00 C1 E0 04 99 B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00
E8 25 9E 00 00 83 C4 14 C7 45 F4 B0 00 00 00 C7 45 FC F0 00 00 00 A1 8C 9C 49 00 C1 E0 05 99 B9
40 01 00 00 F7 F9 89 55 F0 C7 45 F8 40 01 00 00 6A 1C 8D 55 F0 52 68 B0 00 00 00 6A 00 68 1C F9
48 00 E8 E3 9D 00 00 83 C4 14 C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 68 B0 00 00 00 A1 8C 9C 49
00 C1 E0 05 99 B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00 E8 AC 9D 00 00 83 C4
14 8B E5 5D C3 12 24 40 00 72 24 40 00 04 25 40 00 05 28 40 00 05 28 40 00 8C 25 40 00 06 26 40
00 06 26 40 00 CC CC CC CC CC 55

402606-402830

You have to go somewhere with a scrolling background to see it work, of course.

 

Crashes.
You screwed something up near the end tho, or forgot a byte or something.

 

Oh, right, there was some stuff at the beginning too.

55 8B EC 83 EC 1C C7 45 F0 00 00 00 00 C7 45 F4 00 00 00 00 A1 78 9C 49 00 89 45 F8 8B 0D 7C 9C
49 00 89 4D FC 8B 15 88 9C 49 00 89 55 E4 83 7D E4 07 0F 87 FF 03 00 00 8B 45 E4 FF 24 85 0B 28
40 00 C7 45 EC 00 00 00 00 EB 0C 8B 4D EC 03 0D 7C 9C 49 00 89 4D EC 81 7D EC F0 00 00 00 7D 3D
C7 45 E8 00 00 00 00 EB 0C 8B 55 E8 03 15 78 9C 49 00 89 55 E8 81 7D E8 40 01 00 00 7D 1D 6A 1C
8D 45 F0 50 8B 4D EC 51 8B 55 E8 52 68 1C F9 48 00 E8 4A A1 00 00 83 C4 14 EB CE EB AE E9 95 03
00 00 8B 45 0C 99 2B C2 D1 F8 99 81 E2 FF 01 00 00 03 C2 C1 F8 09 99 F7 3D 7C 9C 49 00 F7 DA 89
55 EC EB 0C 8B 45 EC 03 05 7C 9C 49 00 89 45 EC 81 7D EC F0 00 00 00 7D 56 8B 45 08 99 2B C2 D1
F8 99 81 E2 FF 01 00 00 03 C2 C1 F8 09 99 F7 3D 78 9C 49 00 F7 DA 89 55 E8 EB 0C 8B 4D E8 03 0D
78 9C 49 00 89 4D E8 81 7D E8 40 01 00 00 7D 1D 6A 1C 8D 55 F0 52 8B 45 EC 50 8B 4D E8 51 68 1C
F9 48 00 E8 B8 A0 00 00 83 C4 14 EB CE EB 95 E9 03 03 00 00 8B 45 0C 99 81 E2 FF 01 00 00 03 C2
C1 F8 09 99 F7 3D 7C 9C 49 00 F7 DA 89 55 EC EB 0C 8B 55 EC 03 15 7C 9C 49 00 89 55 EC 81 7D EC
F0 00 00 00 7D 51 8B 45 08 99 81 E2 FF 01 00 00 03 C2 C1 F8 09 99 F7 3D 78 9C 49 00 F7 DA 89 55
E8 EB 0C 8B 45 E8 03 05 78 9C 49 00 89 45 E8 81 7D E8 40 01 00 00 7D 1D 6A 1C 8D 4D F0 51 8B 55
EC 52 8B 45 E8 50 68 1C F9 48 00 E8 30 A0 00 00 83 C4 14 EB CE EB 9A E9 7B 02 00 00 8B 0D 7C 9C
49 00 F7 D9 89 4D EC EB 0C 8B 55 EC 03 15 7C 9C 49 00 89 55 EC 81 7D EC F0 00 00 00 7D 53 A1 8C
9C 49 00 99 81 E2 FF 01 00 00 03 C2 C1 F8 09 99 F7 3D 78 9C 49 00 F7 DA 89 55 E8 EB 0C 8B 45 E8
03 05 78 9C 49 00 89 45 E8 81 7D E8 40 01 00 00 7D 1D 6A 1C 8D 4D F0 51 8B 55 EC 52 8B 45 E8 50
68 1C F9 48 00 E8 B6 9F 00 00 83 C4 14 EB CE EB 98 E9 01 02 00 00 33 C9 89 4D F4 C7 45 FC 58 00
00 00 89 4D F0 C7 45 F8 40 01 00 00 6A 1C 8D 4D F0 51 6A 00 6A 00 68 1C F9 48 00 E8 80 9F 00 00
83 C4 14 C7 45 F4 58 00 00 00 C7 45 FC 7B 00 00 00 A1 8C 9C 49 00 99 2B C2 D1 F8 89 45 F0 C7 45
F8 40 01 00 00 6A 1C 8D 55 F0 52 6A 58 6A 00 68 1C F9 48 00 E8 47 9F 00 00 83 C4 14 C7 45 F0 00
00 00 00 6A 1C 8D 45 F0 50 6A 58 A1 8C 9C 49 00 99 2B C2 D1 F8 99 B9 40 01 00 00 F7 F9 B8 40 01
00 00 2B C2 50 68 1C F9 48 00 E8 11 9F 00 00 83 C4 14 C7 45 F4 7B 00 00 00 C7 45 FC 92 00 00 00
A1 8C 9C 49 00 C1 E0 03 99 B9 40 01 00 00 F7 F9 89 55 F0 C7 45 F8 40 01 00 00 6A 1C 8D 55 F0 52
6A 7B 6A 00 68 1C F9 48 00 E8 D2 9E 00 00 83 C4 14 C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 6A 7B
A1 8C 9C 49 00 C1 E0 03 99 B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00 E8 9E 9E
00 00 83 C4 14 C7 45 F4 92 00 00 00 C7 45 FC B0 00 00 00 A1 8C 9C 49 00 C1 E0 04 99 B9 40 01 00
00 F7 F9 89 55 F0 C7 45 F8 40 01 00 00 6A 1C 8D 55 F0 52 68 92 00 00 00 6A 00 68 1C F9 48 00 E8
5C 9E 00 00 83 C4 14 C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 68 92 00 00 00 A1 8C 9C 49 00 C1 E0
04 99 B9 40 01 00 00 F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00 E8 25 9E 00 00 83 C4 14 C7 45
F4 B0 00 00 00 C7 45 FC F0 00 00 00 A1 8C 9C 49 00 C1 E0 05 99 B9 40 01 00 00 F7 F9 89 55 F0 C7
45 F8 40 01 00 00 6A 1C 8D 55 F0 52 68 B0 00 00 00 6A 00 68 1C F9 48 00 E8 E3 9D 00 00 83 C4 14
C7 45 F0 00 00 00 00 6A 1C 8D 45 F0 50 68 B0 00 00 00 A1 8C 9C 49 00 C1 E0 05 99 B9 40 01 00 00
F7 F9 B8 40 01 00 00 2B C2 50 68 1C F9 48 00 E8 AC 9D 00 00 83 C4 14 8B E5 5D C3 12 24 40 00 72
24 40 00 04 25 40 00 05 28 40 00 07 28 40 00 8C 25 40 00 06 26 40 00 06 26 40 00 CC CC CC CC CC
55

It starts all the way up at 4023d0 now

 

Haha, that's pretty epic.
7/10 for frighteningosity and massiveness.
No more hacks now, but mebbe later.


Woot 25th post today.

 

This is quite nifty and I hope somebody tries it.
in ORGVIEW not CAVE STORY!!!!
404b80 put a retn (effectively dummying out that function).

Do it :0

 

This is quite nifty and I hope somebody tries it.
in ORGVIEW not CAVE STORY!!!!
404b80 put a retn (effectively dummying out that function).

Do it :0

That is hysterical and cool.
Also, huzzah.
It worked...
Until it spiraled out of control and crashed.

 

For insanity:

46F065
8B 4D 08 41 90 90 90 90 90 90 90 90 89 8A 48 62 4A 00

This one will definitely crash the game after a while. Not that it'll hurt anything, but just saying.

 

10/10 for sheer WTF


I have one (pretty lame, as it's only the 2nd asm hack I've ever done).


0x415B62:
0F 84 B2 00 00 00

0x415BC5:
74 53

0x415BE5:
74 33

0x415BF5:
EB 23 BA 00 00 00 80 89 15 70 E6 49 00 6A 01 6A 29 E8 45 97 FF FF 83 C4 08 50 E8 CC B2 00 00 83 C4 04 90 90 90 A1 30 36 49 00 0B 05 38 36 49 00


read once you've played:

Spoiler

I tried to make it so it would play a random song every time you jump and make you jump super crazy high. In reality, it only makes you jump a little bit higher (you can jump 4 tiles instead of 3). What I'm wondering about the most is the music part. Instead of playing a random song, it just repeats the song that was just played. What am I doing wrong?

 

7/10 for good effort (And not crashing!)
Well, for one you had the arguments for Rand# backwards - it's PUSH MAX, PUSH MIN. That'll fix the song problem.

As for jumping, not sure about that. The value you used was so large that I would expect it to break something for one D:
And for two, remember up is negative
There's a series of velocity caps starting at 41607b - tinker with the ones that say 5FF and it should let you skyrocket yourself to unsafe speeds.

416103
81 3D 70 E6 49 00 01 A0 FF FF 7D 0A C7 05 70 E6 49 00 01 A0 FF FF 81 3D 70 E6 49 00 FF 5F 00 00
7E 0A C7 05 70 E6 49 00 FF 5F 00 00

Oh, interesting side effect of yours... it made the game go REALLY slow during a TSC event. Not sure why that is but... Hm.

I'll do a hack of my own in a minuite when I think of something.

 

Ah, in your compendium it said

Random Num Generator:
push min
push max
call 40f350 ; returns into eax
add esp,8

so you might wanna fix that.

I tried running a TSC event in mine and it didn't slow down. I'm guessing you missed one of the four things that change "JMP 415C0E" to "JMP 415C1A". At first when I tried the hack, it was always running really slow regardless of whether I was in a TSC event, and the music was always turned off. The code that was formerly at 415C0E was code that unset Quote's "examining object" flag if necessary. I had to shorten it to make room for the random music code. You'll notice that, in my hack, if you press the down arrow and make Quote turn his back to you, he'll stay like that if you press the up arrow. The problem was that, when the code jumped to 415C0E (which it does every frame) it would invoke <CMU (very costly, evidently) with whatever happened to be in EAX. I had to find all the places that jump there (which Olly makes it very easy to do, luckily) and change them to skip over that part to the next part.

I look forward to seeing yours

 

Yeah, I fixed that in my copy, but haven't got around to changing it on the uploaded version :/

Anyway... figured out something to do. I'd originally wanted to have a "Self-Destruct" key but that would be kinda boring, so I wanted to make it so that it brought you back to life if you pressed it again. However, all these things were more difficult than I'd first estimated, so I scrapped the idea.

48b900

FF 05 00 BA 4B 00 83 3D 00 BA 4B 00 24 7E 31 6A 20 68 00 20 00 00 FF 35 58 E6 49 00 FF 35 54 E6
49 00 E8 29 38 FE FF 83 C4 10 C7 05 00 BA 4B 00 00 00 00 00 6A 01 6A 48 E8 03 4D F9 FF 83 C4 08
0F B6 05 38 E6 49 00 C3

4156C6

E8 35 62 07 00 90 90