I'm already about 2/3 through DX after a first playthrough since 2007, started it a couple of weeks ago. Why am I not playing IW instead? Because it crashed within about 5 minutes of starting a game last time I tried to replay it. DX is buggy, but IW is even worse! A couple of reasons why DX is considered a better deal than IW is due to the length of the game (DX is much longer and it isn't all filler) and also the fact the IW had become consolised with some very small areas, which became annoying to travel through as you only had to walk a small distance and then another very long loading screen would load up. Most people complain about other things like interface issues, and poor performance when it was released, but it is mainly the lack of depth that is really why IW is considered weaker by DX fans. For example, in DX there were absolutely loads of datacubes and news kiosks to read stuff, and if you kept prompting a character, you'd get alot more response with continuing information. IN DX datacubes were pretty rare, so alot of tiny details that made DX fun to explore just simply went. The second game as I mentioned before also suffers from being much shorter than the original, and offers a lot less value for money due to this - it's easily 2 - 3 times longer if played correctly. I did like IW when it came out, and at the time I actually thought it was pretty decent, but looking back now, i just feels so hollow and empty compared to the original, as though it was rushed and there isn't any soul to the game. Anyway, a quick thing about Doom 3 and Halflife 2 - Doom3 is worse simply because it is one of the most boring, repetitive, and thoroughly annoying games I have ever played and to this day, even though I played for quite a while, I never finished it. Just too damn dull. It was the same thing all the time, lights go out, monsters appear, you kill them, then move on. It is repeated pretty much the whole game, and makes it completely enjoyable. HL2 has very fun gameplay, with alot of different environments, and feels action packed all the way. Doom3 can have all the audio logs in the world, but it will never make it an exciting game to play.