Portal and Half-Life 2 were both launch titles for the SHIELD Portable, and to this day remain two of the best games you can play on Android. Recently, both apps got updated to support Android TV, which really only means one thing: they support the new SHIELD set-top box. That's good, because playing them on the TV is honestly one of the best ways to experience these classic FPS titles. Here's a look at the changelogs for each:

Portal

portal2

What's New
- Android TV support
- UI improvements
- Broader localizations
- Cloud saves, achievements

Half-Life 2

hl2

What's New
- SHIELD Android TV support
- UI improvements
- Broader localizations

While Portal got cloud saves and achievements via Google Games, it looks like HL2 may have not been so lucky. But I haven't had a chance to check yet - perhaps they just left that out of the changelog.

Either way, if you ordered a SHIELD, you're going to want both of these on your system.