With so few good new titles being released these days, especially by major studios, I figured I'd make a thread for everyone to share your favourite classic or older games, especially if they're lesser-known titles that others might have missed at the time.
I'll open with The Saboteur (2009), Mercenaries (2005) and Saints Row 2 ( The 2008 original)
I'm assuming everyone already has a copy of warcraft 3 as well as left 4 dead 2 on steam.
Fallout NV, Batman Arkham and Arkham City.
Throw in a decent dirt cheap fps like CS Go and/or TF2 and you're good to go.
I'd also try Mass Effect and X-Com, but those take up way too much space despite being old and cheap.