sushix said:
Any achievement/trophy that is awarded playing the campaign. Is it so hard to think that I can play the single-player just to play it? Do I need some sort of meta-reward for doing what I was already going to do? Seriously.
I like these achievements personally, because they help me be sure I'm doing what I'm supposed to do. I've been playing through Half-Life 2 and its sequels for the first time recently, and I like knowing when that little achievement pops up, my current task is done. Plus Valve has a clever way of doing their achievements. You can glance at them before you play and just try to guess what they are about, like the Portal 2 Achievements. They released those before the game even came out, and rumors swirled about what they could possibly mean. Like "Lunacy: That just happened."
And then as you play the game, they pop up and you realize what they really mean. That, and they serve as a periodic reminder to check the achievements to see if there are any optional ones that can be approached at the time.
And even if you don't need all those little features, what are they doing to hurt you? Nothing. They don't interrupt the experience. It's not like every time you get one you're pulled off to some screen bright screen with loud celebratory music saying you got the achievement. It just silently slides up and then down in the corner. That's it.