pak1.pak (this is for Quake, to run quake in your browser click here.) 

pak0.pak (this is for Quake 2, NOT the shareware file for Quake. To run Quake 2 in your browser click here.) 

doom2.wad (this is for Doom II, to run doom in your browser click here.)

doom.wad  (this is for Doom, to run doom in your browser click here.) 

TNT.wad (this is for TNT Evilution (doom mod), to run doom in your browser click here.)