Let's Plays Sorted by Genre

RPGs

Chaos Strikes Back (Amiga, 1989)

Dungeon Master (Amiga, 1987)

The Elder Scrolls V: Skyrim (PC/Windows, 2011)

Eye of the Beholder (Amiga - AGA version, 1991)

Eye of the Beholder II: The Legend of Darkmoon (Amiga - AGA version, 1992)

Legend of Grimrock (PC/Windows, 2012)

Phantasy Star Gaiden (Game Gear, 1992)

Phantasy Star Generation: 1 (PlayStation 2, 2003) 

Planescape: Torment (PC/Windows, 1999) - Currently Playing

Quest For Glory: So You Want to Be a Hero (PC/DOS, 1992)

Sentinel Worlds I: Future Magic (PC/DOS, 1988)

Shadowrun Returns (PC/Windows, 2013) - Currently Playing

Wasteland 2 (Beta Footage) (PC/Windows, 2014) 

Adventure Games

Beneath a Steel Sky (PC/DOS, 1994)

The Book of Living Magic (Flash game, 2011)

Dragonsphere (PC/DOS, 1994)

The Fabulous Screech (PC/Windows, 2012)

Hacker (PC/DOS, 1985)

King's Quest I: Quest For the Crown (AGD Interactive remake) (PC/Windows, 2008)

King's Quest II: Romancing the Stones (AGD Interactive remake) (PC/Windows, 2010)

King's Quest III Redux: To Heir is Human (AGD Interactive remake) (PC/Windows, 2011)

Lure of the Temptress (Amiga, 1992) 

Phantasy Star Adventure (Game Gear, 1992)

Phantasy Star II Text Adventures (8 small games) (Genesis, 1992)

The Sea Will Claim Everything (PC/Windows, 2012)

Serena (PC/Windows, 2014)

Star Trek: Borg (PC/Windows, 1996)

Star Trek: Klingon (PC/Windows, 1996) 

The Strange and Somewhat Sinister Tale of the House on Desert Bridge (PC/Windows, 2008)

Syberia (PC/Windows, 2002)

Experimental

Insert Title Here (PC/Windows, 2012)

First-Person Shooters

Battlefield 3 [Let's Fail] (PC/Windows, 2011)

Postal 2 + Apocalypse Weekend + Eternal Damnation (PC/Windows, 2003)

Platformers

Portal (PC/Windows, 2007)

Portal 2 (PC/Windows, 2011)