Q: The Final DOOM expansions and the Master Levels are shown in the expansion list on DOOM II but when I select them they show "Missing Expansion" message what gives?
A: Classic RBDOOM 3 BFG supports the Final DOOM expansions and the master levles, but in order to play them then you need:
1. To own them (obviously)
2. a)Copy the WADs (TNT.WAD and PLUTONIA.WAD) to \base\wads
b) Copy the "wads" folder from Master Levels to \base\wads and rename it "master"
and you are good to go.
Q: Can I use mods for DOOM 3 BFG Edition with that? (like @UltimateHD or Hi Def)
A: Yes,yes you can
Q: Can I use brutal DOOM with that?
A: No, you can't. Classic RBDOOM 3 BFG Edition has same mod compatibility with the DOS engine and with the addition of built-in DEUSF and DEHACKED. The brutal DOOM mod uses zdoom additional features (which are not available on this mod)
Q: Where I can Find the source code / 32-bit executables?
A: Here : Github.com
Q: Is there any launcher for this mod?
A: Yes, the launcher is bundled with the main binaries on every release it's called CDL.exe
Q: What is "Mod base" in the launcher?
A: Mod Base is like setting a expansion. Well in this case you can set a resource mod (aka a mod that adds graphics,sfx and other files that the main mod doesn't change). So in some way first it loads the mod base and then the mod.
Q: I have found an amazing mod for the original Doom 3 and I want to port it on BFG is there any way to do it if I am not a Modder?
A: Yes, there is. With every release there is and a tool named "pk4toBFG.exe", this tool allows you to extract .pk4 files in a single directory allowing you to load this mod on BFG.
Q: Can I still get Steam Achievements with this?
A: Yes, if you download Open Platform with Steam and extract the desired OpenPlatform.dll to the game's base directory and the steam_api to the executable directory and make a steam_appid.txt on the executable's directory and write in it the game's steam id.
(NOTE: Some mods might not be compatible with BFG, in that case ask the original Modder if he/she can port his/her mod to BFG, don't ask me for that)
For more information look the projects Wiki : Github.com