Easy Games for 100% Achievements

in 3 hours i got 100% in Thomas Was Alone :) good game

Scribblenauts Unlimited, The Stanley Parable (sort of have to cheat w/ the one chieve about playing for 5 yrs but besides that all legit), Papers Please, and The Walking Dead.

Super sanctum td

Adam's Venture (all 3 episodes)

Adam's Venture (all 3 episodes)

Murdered Soul Suspect is a very easy 100%. The entire game is pretty much one big collectable hunt, I got probably 90% of them too on my first playthrough without really trying. With a guide, it's cake.

Brothers: A Tale of Two Sons is pretty easy as well, if you don't mind using a guide. None of them are difficult or even time consuming, they just aren't very descriptive and involve doing things you probably wouldn't think of just playing the game.

The only games that I 100% are the two The Walking Dead games and both Metro games. Metro: Last Light Ranger Hardcore was definitely easier than Metro 2033's Ranger mode.

Dino D Day is a great game, but its achievements are super easy XD

super hexagon, only 6 achievements. not that hard :P

Getting 100% in Gunpoint was surprisingly easy.

Ironclad Tactics ;)

ETA: Imagine Me (from the Alienware giveaway) also, I took 15 minutes to 100% cheevs, it helps that their tracking system is borked so 1 fall actually counts for a lot more ;)
Though they will be adding new achievements in the (distant?) future...

The Plan
Free to play, only 1 very easy achivement take you only 5 minutes.
Guides here, just choose one

Fortix 1 wasn't too bad, depending on how well you pick up to the game's insane difficulty setting. Puzzler world 2 just takes time now that the unattainable achievement has been removed.

i have 100% on these 17 games:

• Aquaria
• Blackwell Convergence
• Blackwell Deception
• Blackwell Unbound
• Deus Ex: Human Revolution
• Deus Ex: Human Revolution - The Missing Link
• Faerie Solitaire
• Gemini Rue
• Gunpoint
• Half-Life 2
• Half-Life 2: Episode One
• Half-Life 2: Episode Two
• On the Rain-Slick Precipice of Darkness, Episode Two
• SpaceChem
• The Blackwell Legacy
• The Shivah
• Toki Tori

i typically play through and see what i get, then look at the achievements that are left and try to get any of the rest that seem at all reasonable. they weren't all easy, but most of them have guides to help you find them.

Maybe this help u:
http://astats.astats.nl/astats/Steam_Games.php?DisplayType=Achievements&Sort=9

Heileen 1: Sail Away. 89 minutes to get all three.

The Plan, it's free and u need to do one click to get 100%.

DLC QUEST

Call of Duty: Black Ops Multiplayer. There are only three achievements and they're fairly easy to get.

Actual Sunlight - Just play through the game and you 100% it. You can finish the game before you even get all the trading card drops.
To The Moon - also pretty easy, just finish the game
Dysfunctional Systems - Doesn't take long, but not as easy as the above two since you'll probably need a guide, but there is a good one on Steam, can 100% it within 2 hours
Strata - I 100%ed the game pretty easily. The puzzles aren't that hard and it's a good play for a few minutes and relax sort of game while being pretty easy to 100%

Actually here is my list of completed games on Astats, sort by hours played and you can see which ones are quick.
And here is another good listing.

Contrast

Altitude, only took about 300 in-game hours.

Akane the Kunoichi.
I got all achievements for 4 hours.