Thief, Diablo III, StarCraft, Titanfall, Elder Scrolls, Dark Souls II.
I also love being able to play MP3's in Winamp and play visualizations like Geis & Milkdrop fullscreen using my Samsung TV as a extended monitor. Some of these use DirectX and other like AVS are purelly CPU driven.
Here's what's in dxdiag.txt for the current APU+GPU processor.
Card name: AMD Radeon HD 7660D
Manufacturer: Advanced Micro Devices, Inc.
Chip type: AMD Radeon HD 7660D (0x9901)
DAC type: Internal DAC(400MHz)
Device Type: Full Device
Display Memory: 2161 MB
Dedicated Memory: 753 MB
Shared Memory: 1408 MB
Current Mode: 1920 x 1200 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: SyncMaster
Monitor Id: SAM0423
Native Mode: 1920 x 1200(p) (59.950Hz)
Output Type: HDMI