I'm going for backlog (i.e. brought not this year) and quality (i.e. have been recommended for me). I did a silly amount of achievement hunting (143 100%s and 3666 achievements got during 2015). So I'm going to relax a bit and play more for fun.

You lot aren't even trying:

Sweezy Gunner (the "new" challenge achievements)
Age of Empires II (Campaign and multiplayer)
Muffin Knight (Stupid multiplayer and grindy XP)
Epic Battle Fantasy 4 (Need to play it through a couple more time; I dislike "play this game multiple times" type achievements)
Braid (Speed run)
Nation Red (the newer achievements and the kill 1 millions zombies)
Counter-strike: source (multiplayer and grinding)
Saints Row: Gat out of Hell (multiplayer)
Universe Sandbox (Run for a year)
Toy Soldiers (complete campaign+ with all ration tickets)
Death Rally (the rank ones, because you have to play what feels like 5 millions races and your rank degrades if you don't play it - stupid idiot devs)
Demolition Inc (A couple from the DLC)
Guns 'n' Zombies (playthough on co-op)

I have plenty more in my "grinding" section or that I could probably 100% with some time spent with help from other people.

Bardbarian, it's quite fun, a bit grindy; but nothing too difficult.

Time would be much better spent persuading the developers to fix -- or remove the broken achievements (and we have had some success doing it in the past -- including the infamous Puzzler World 2).

You only get "episode 0" free; which has 2 achievements. The rest you have to pay for.

They do work - though bear in mind that it can take a few minutes to sync between the real values and those displayed.

I've noticed a strange bug in other games when sometimes, if you run multiple instances of the same game then the counter may become stuck.

Just to warn you: many sites such as astats regard the hibernation, adjust clock technique as cheating.

You can actually spawn the game twice and it will use a demo key which will restrict some of the game play, but saves you having to buy it twice!

Like cos and corsario: once you get over 100, it gets hard to count because of broken achievements and games removed from stored.

As far as I can tell average completeness is broken: mine's been stuck on 50% since the stat started. It's the Chris disease I tell you!

It looks like the Broken Achievement tag has been removed (or at least I get a tag not found error), some developer getting a bit haughty?