If you have about five minutes to spare, You Have to Burn the Rope is one of the greatest video games of all time. And the song that plays over the credits is great, too! A Flash game masterpiece only rivaled by the great Frog Fractions.
Finished Batman: Arkham Asylum last night. Just shy of 15 years after launch, the game holds up pretty great, with satisfying combat and gameplay, a fantastic voice cast, and a cool island. There's a bit of a blend of Metroidvania and Legend of Zelda-style level design, with the locations acting as different dungeons, but with extra paths and secrets that require return trips with future upgrades to access.