The graphics and action were good, for the original HL issue. But the newer game engines and higher-res graphics put it to shame, in a way. One great part of the original HL was that you could use the "E" key when facing a sprite (comrade), and issue commands.. such as 'follow', 'stay put' or 'scout ahead'. Was nice to have a squad following you, on some missions. I'll be getting the mod for HL, soon.
But no matter how "new" and "advanced" the game engine is, we still see octagonal 'round' cans and other objects!
If you can't find the Doom mod, I do have it.. 203 Mb.
has the mod, as well as some other Doom mods.
If you do the patch for the Doom 3 game, don't use the 'duct tape' mod. That is already in the fix.
There is a "trap" in the original Doom mod. You get to the end of a hallway, operate a switch, and nothing happens. But that opens a door on the opposite end of a hallway! Sneaky!
When you are in the 'lava tunnels', look for a secret door.. and take notice of the graffiti on the walls.. "Doom will never be the same
Not advising any cheats, but if you do, you get all the "gee-whiz" weapons and
flashlight from Doom 3!!
F@H.. to solve mankind's maladies.. in our lifetimes!