So i'm new to all these things and today i was trying to modifying datas from a game.
the game is on pc platform and named 'bugatron world' it's developed by retro64, it's a sort of galaga like.
i've noticed a file "smash.wad" who seem to contain all the interesting stuff (musics, graphics, xml config of levels, etc..)
here is a small snippet of inside this file:
Code: Select all
<POWER_UPS>
<CAPTURE FREQUENCY="12" MODEL="capture" BULLET_MODEL="cap" FONT="powerup" POINTS="50" TEXT="CAPTURE!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<GUIDED FREQUENCY="5" MODEL="guided" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="GUIDED BULLETS!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<ADD_BULLET FREQUENCY="5" MODEL="extrab" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="EXTRA BULLET!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<WRECKING_BALL FREQUENCY="5" MODEL="wb" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="WRECKING BALL!" EXTRA_MODEL="link" EXTRA_MODEL="mace" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<ACCELLERATION FREQUENCY="5" MODEL="accel" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="ACCELLERATION!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<DIRECTIONAL FREQUENCY="5" MODEL="angular" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="DIRECTIONAL BULLETS!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<SPINNER FREQUENCY="5" MODEL="spinners" BULLET_MODEL="spinner" FONT="powerup" POINTS="50" TEXT="WIGGLE SHOT!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<FIREBALL FREQUENCY="5" MODEL="fireb" BULLET_MODEL="fireball" FONT="powerup" POINTS="50" TEXT="FIREBALLS!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<EXTRA_LIFE FREQUENCY="1" MODEL="plusone" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="EXTRA LIFE!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<TRIPLE_SHOT FREQUENCY="5" MODEL="tripleshot" BULLET_MODEL="fireball" FONT="powerup" POINTS="50" TEXT="TRIPLE SHOT!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<GUIDED_ROCKETS FREQUENCY="5" MODEL="guidedrockets" BULLET_MODEL="rocket" FONT="powerup" POINTS="50" TEXT="HEAT SEEKING ROCKETS!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
<RAILGUN FREQUENCY="5" MODEL="railgun" BULLET_MODEL="bullet" FONT="powerup" POINTS="50" TEXT="RAILGUN!" SPAWN_SOUND="puspawn.ogg" CATCH_SOUND="powerup.ogg" BOUNCE_SOUND="ping.ogg">
</POWER_UPS>
</LEVEL>
The <POWER_UPS> part is related to bonus drop when you kill an enemy.
But when i try to insert more chars (meaning increasing filesize) for example changing the extra_life frequency from 5 to 99, the game just crash when it try to load the WAD file.
I don't know much about WAD files, from what's i've read it's originating from doom, so i tried to find tools but they was obviously related for doom WAD files and with a bit more googling i ended up on a wiki pointing to this forum.
The 4 first bytes of the WAD file is 42 4D 36 0C (BM6) i have no idea if there is a sort of standard for wad file format or similar.
Maybe by increasing filesize i broke a CRC or something, i don't know and i'm out of ideas on how i can edit properly game level infos...
If someone with experience can guide me ?
Here is the download for wad file, it's arround 43Mb: http://rgho.st/7Cl2WYDxh