RPGs: ✔=recommended
TheAge of Decadence(100%) ✔
Dark Sun: Shattered Lands ✔
Geneforge 1 ✔
Fallout 1 ✔
Vampire: The Masquerade - Bloodlines ✔
Knights of the Old Republic II ✔
Dragon Age: Origins ✔
Ultima Underworld ✔

Fallout 2
Fallout New Vegas + Old World Blues
Morrowind
Neverwinter Nights 2

Pseudo-RPG/Strategy:
Divinity: Original Sin
Baldur's Gate + Tales of The Sword Coast
Baldur's Gate 2: Shadows of Amn + Throne of Bhaal

Strategy:
X-COM: UFO Defence ✔
Gorky 17 ✔
Command & Conquer 1 ✔
Command & Conquer Tiberium Wars ✔
Black & White 1 ✔
Master of Magic ✔
Warcraft 1 ✔
Warcraft 3 + Frozen Throne ✔
Z ✔

Shooters:
Deus Ex ✔
SystemShock 2 ✔
Max Payne 1 ✔
STALKER Shadow of Chernobyl ✔
Quake 1 ✔
Strife: Veteran Edition (Bloodbath) ✔
Chasm: The Rift ✔
Terra Nova: Strike Force Centauri ✔
Aliens vs Predator 2 ✔
Crysis 1 ✔
F.E.A.R. ✔
Hotline Miami ✔

Quake Scourge of Armagon + Dissolution of Eternity

Stealth:
Hitman Silent Assassin, Blood Money ✔
Splinter Cell 1, Pandora Tomorrow, Chaos Theory, Double Agent ✔
Manhunt ✔

Adventure:
Batman Arkham Asylum, City, Origins
Grand Theft Auto IV
Assassin's Creed 1
Metal Gear Solid 4: Guns of The Patriots

To complete: