Is there a way to see what games contribute to my Avg. Completion Rate?
I've written a script to solve this problem. It can be found on GitHub here. If you are not a developer, please use the website above!
It tells you what games are below average, and which ones are the easiest to boost (strictly mathematically). Improvements and pull requests are welcome. I know very few people will want to download something for this, but it's the best I can do without having a server. Here's a sample run of the code:
$ node index.js --api-key=XXX --vanity-url=seiyria
Resolving vanity url "seiyria"...
Getting games for steam64id: 76561197998412147...
Found games: 416 (not all of these will count)
Found 95 games that count for Avg. Completion Rate, sorting...
Your average percent: 29%
Games below the average (sorted by easiest to boost, numerically):
Adventures of Shuggy: 3/13 23.08%
Monaco: 2/13 15.38%
Worms Clan Wars: 3/14 21.43%
Tower of Guns: 4/17 23.53%
Frozen Synapse: 2/16 12.50%
Rochard: 3/18 16.67%
Dungeon Hearts: 2/17 11.76%
Lost Marbles: 2/17 11.76%
Cogs: 1/18 5.56%
Wizorb: 2/20 10.00%
Scribblenauts Unlimited: 4/25 16.00%
Puzzle Dimension: 3/25 12.00%
Legends of Aethereus: 1/23 4.35%
Shatter: 7/30 23.33%
Stealth Bastard Deluxe: 4/27 14.81%
Tiny Barbarian DX: 4/27 14.81%
Dwarfs!?: 5/29 17.24%
Orcs Must Die! 2: 3/27 11.11%
Crypt of the NecroDancer: 2/28 7.14%
Wanderlust: Rebirth: 3/30 10.00%
Foul Play: 3/30 10.00%
I am Bread: 8/35 22.86%
Trine: 4/33 12.12%
Pixel Piracy: 1/30 3.33%
Blocks That Matter: 1/32 3.13%
Half Minute Hero: Super Mega Neo Climax Ultimate Boy: 3/35 8.57%
Runespell: Overture: 1/35 2.86%
Tower Wars: 1/35 2.86%
Hotline Miami: 1/35 2.86%
Hammerwatch: 4/40 10.00%
Atom Zombie Smasher : 4/41 9.76%
Just Cause 2: 12/50 24.00%
Gauntlet™ : 5/43 11.63%
Hero Siege: 9/51 17.65%
Sleeping Dogs™: 16/59 27.12%
Super Meat Boy: 4/48 8.33%
KRUNCH: 4/51 7.84%
One Way Heroics: 11/59 18.64%
Darksiders II: 1/50 2.00%
Torchlight: 16/66 24.24%
Alien Swarm: 15/66 22.73%
Left 4 Dead: 15/73 20.55%
Worms Reloaded: 1/61 1.64%
Beat Hazard: 1/63 1.59%
Magicka: 25/88 28.41%
Rhythm Zone: 10/80 12.50%
Saints Row: The Third: 3/83 3.61%
The Binding of Isaac: 2/99 2.02%
Sanctum: 1/100 1.00%
Reus: 16/123 13.01%
HOARD: 9/129 6.98%
A Valley Without Wind 2: 1/210 0.48%
Sid Meier's Civilization V: 34/287 11.85%
Killing Floor: 21/285 7.37%
Games above (or at) the average (sorted by easiest to boost, numerically):
bit Dungeon II: 13/15 86.67%
Eversion : 11/14 78.57%
140: 3/6 50.00%
Cities: Skylines: 29/33 87.88%
Grotesque Tactics: Evil Heroes: 4/10 40.00%
Papo & Yo: 4/10 40.00%
Rogue Legacy: 21/28 75.00%
Nidhogg: 5/12 41.67%
Pid : 4/12 33.33%
Portal: 6/15 40.00%
Chime: 6/15 40.00%
DLC Quest: 13/22 59.09%
TowerFall Ascension: 20/29 68.97%
Vertical Drop Heroes HD: 19/30 63.33%
SteamWorld Dig: 12/24 50.00%
Bastion: 9/24 37.50%
Pillars of Eternity: 16/31 51.61%
BIT.TRIP Presents... Runner2: Future Legend of Rhythm Alien: 10/26 38.46%
Quantum Conundrum: 8/25 32.00%
Mark of the Ninja: 21/38 55.26%
Super Puzzle Platformer Deluxe: 27/44 61.36%
Shovel Knight: 27/45 60.00%
La-Mulana: 44/64 68.75%
Transistor: 10/33 30.30%
Thief: 13/37 35.14%
Portal 2: 26/51 50.98%
State of Decay: 20/46 43.48%
Gunpoint: 15/42 35.71%
Dishonored: 51/80 63.75%
Goat Simulator: 58/87 66.67%
Dungeon Defenders: 73/104 70.19%
Borderlands 2: 33/69 47.83%
Borderlands: 33/80 41.25%
Left 4 Dead 2: 22/70 31.43%
Torchlight II: 70/119 58.82%
Defense Grid: The Awakening: 35/87 40.23%
A Valley Without Wind: 32/98 32.65%
Trine 2: 30/97 30.93%
Team Fortress 2: 156/513 30.41%
Third party websites like the one Seiyria made are great, but do not take into account the games you played during free weekends, and probably also miss games you played using Steam Family Sharing.
If your Steam level is 10 or above, you can see an exact list of games that contribute to your Avg. Game Completion Rate using the Achievement Showcase. While selecting an achievement to display, Steam shows a dropdown input that contains all games you have earned at least 1 achievement for, including games you don't actually own. (free weekend games, family sharing, maybe even refunds)
https://completionist.me provides an excellent and extremely easy-to-view bar graph on the right side of your profile showing how many games you have in each bracket of percentage completion (my chart):
Above, you can see that I have 984 games with 100% achievements and 12 games with 0-5% completion. You are able to click into each bar to dive down into which specific games from your Steam account fall within that range of completion (my 5-10% games):
If you are missing certain free weekend or removed/refunded games, cme provides a recovery process: https://completionist.me/steam/recover
Source: 100Pals Official Achievement Hunter Community: https://www.discord.me/100Pals