Games in Which I've Acquired All the Achievements:
Asphyxia: 11/8/15
Carpe Diem: 12/13/15
The Lost Mythologies: 1/1/16
Highway Blossoms: 12/28/16
Once on a windswept night: 2/6/17
Strawberry Vinegar: 2/12/17
Ambre - a heartbreaking kinetic novel: 6/10/17
To the Moon: 7/23/17
Dreaming Sarah: 8/1/17
The Sad Story of Emmeline Burns: 8/28/17
Emily is Away: 8/29/17
A Wild Catgirl Appears!: 9/3/17
Blossoms Bloom Brightest: 9/4/17
Ambre - a heartbreaking kinetic novel: 6/10/17

Games I've Completed That Don't Have Achievements:
Eternal Senia: some time in 2014
Rising Angels: Reborn: midsummer of 2015
Star Wars: Dark Forces: winter break of 2015
Half-Life: midsummer of 2016
Half-Life: Blue Shift: midsummer of 2016
Half-Life: Opposing Force: midsummer of 2016
Undertale: late summer of 2016

Games I've Completed Excluding Some Achievements:
Hotline Miami: 11/21/15
Shadowrun: Dragonfall - Director's Cut: 1/29/16
HuniePop: 2/19/16
DmC Devil May Cry: 5/29/16
Portal: 7/2/16
Half-Life 2: 6/17/17
Half-Life 2: Episode One: 6/23/17
Half-Life 2: Episode Two: 7/6/17
Half-Life 2: Lost Coast: 7/7/17
Portal 2: 7/16/17
Octodad: Deadliest Catch: 8/10/17
Gunpoint: 8/20/17
SteamWorld Dig: 8/28/17
Shovel Knight: Treasure Trove: 11/10/17
Doom: 4/5/18