I just beat all 20 levels of Hell Light World without dying, but I didn't get the Brimstone Boy achievement. What a damn rip-off. I didn't use Steve/Meat Ninja and I didn't exit the world at all. Also, Steam didn't notify me of achievements being offline or anything.

Feeling really cheated right now. First the leaderboard warp zone glitch, and now this.

Edit: I did it again (and straight from the previous successful attempt, no deaths in between; does that make me a double Brimstone Boy?), and I thought it bugged out again until I exited the game, then it gave me the achievement. What the hell. Well, at least that's over with now.

Edit 2: Ok, now for some tips.

My route ended up being very segmented due to certain levels being very easy to die on. I started at 18, then went 6-8, 15-17, 19-20, 1-5 and 9-14. Viridian breaks quite a few of these levels, and most are obvious. Oracle, Lost Highway, Weibe, Hive, Boilermaker, Hex, etc. On Lost Highway, there's a specific timing you can take advantage of after you get through the second portal. If you switch gravity a little bit (but not immediately) after the lava ball hits the wall, you can steer just to the right of the top portal and land safely, then make your way to the safe spot next to the saw.

First thing you'll want to do though is to get down timings for levels with abaddons in them. For Abaddon (the level), find a sequence of jumps that always works. For instance, I found that if I jump early with Meat Boy, then walljump up, the Abaddon will never hit me.

Another thing is to just use Meat Boy for Heck Hole (the one with the rising lava). I know it's tempting to use Viridian, but that last jump is tricky with him (or at least it is for me anyway). Also, Flywrench makes Rickets quite a bit easier, you just need to get used to its run timing.

Also, congratulations 73L on getting Zombie Boy. You're way better at this game than I'll ever be, that's for sure.

I hope someone makes a Meat Ninja level pack. If not, I might have a go at it.

Looks like I'm one of those people who won't be able to go for leaderboard times because of the warp zone glitch. Oh well, back to Brimstone Boy I guess.

It would certainly provide more incentive to unlock Dr. Fetus Boy.

Congratulations you have OCD! () was supposed to be the achievement for getting A+ for every single level.

Any idea as to why it was removed?

Because it was bugged, and Team Meat couldn't fix it without breaking other things.

Just got Blood Clot Boy after about an hour's worth of attempts. I started at 2-3X (Buzzzcut) because it's so easy to die on that level. I went 3-20, then 1-2 (I originally skipped Agent Orange-Cher Noble-The Moon [5-7] and went straight to Grape Soda, but then when I came back, I kept dying at The Moon of all levels). Here are some things I found helpful:

For Grape Soda, don't get too close to the needles at the beginning because when you jump up, they'll hit you even though they shouldn't.

Use Captain Viridian for Agent Orange, Centipede and Dust Bunnies. In Dust Bunnies, you can basically just run straight to the end with minimal dodging (you should practice it first though before starting your run).

Remember, the Kid can double jump even after running off a platform. It makes jumps like the ones in Kracken easier.

And of course, use Jill for Pinkeye Falls.

Other than that, I used the Kid for everything else except Electrolysis and Tenebrae, which I used Meat Boy for.

Hope this helps someone out there.

Edit: Oh, one other thing. The faster you do Crawl Space, the easier it will be for you to get back to Bandage Girl (after a while the ulcers all hover over to the left side; one of them even went into the hole Bandage Girl was in).

Since you're probably not reading the Steam thread anymore, I'll put my suggestion here.

One minor thing is that the game audio is almost nonexistent. If you could turn it up in future videos that'd be great.

Keyboard (with re-configured controls). I have a controller, but I'm not as good with it and it hurts my fingers.

                       Forest /  Hospital   /   Factory /   Hell   /   Rapture   /   The End   / Cotton Alley
Light World:          /           /          /      /           /               /          
 Dark World:          /           /          /      /           /               /            

I'm not very good at this not dying thing. I'm trying for Blood Clot Boy right now because Abaddons can go to hell (oh wait, they're already there).

Some Squirrel Boy advice: Start at Mystery Spot and abuse Captain Viridian whenever you can. You can also complete Whitewash (the bright silhouette level) easily with Naija.