Halo	Source: Bungie

The game tells the tale of Master Chief, the last surviving Spartan -- a genetically enhanced breed of future super soldier, as he battles mankind's greatest threat -- the Covenant. Released in 2003, Halo is Microsoft/Bungie's first person shooter classic. The game takes advantage of DirectX 9 shaders as well as Pixel Shader 2.0.

Halo
1024x768:	FPS	Ranking
Gigabyte GV-RX18L256V-B	123.4
ATi Radeon X850 XT PE	122.9
MSI RX850XT-TD256E	120.39
MSI RX800XT-VTD256E	119.41
ATi Radeon X800 XL	114.03
PowerColor X700 Pro	74.81
MSI NX7800GTX-VT2D512E	129.77
MSI NX7800GTX-VT2D256E (Single)	128.41
MSI NX7800GTX-VT2D256E (SLI Mode)	139.58
Asus EN7800GT 2DHTV/256M/OSP/A (Single)	122.38
Asus EN7800GT 2DHTV/256M/OSP/A (SLI Mode)	139.32
MSI NX6800GT-T2D256E	108.39
MSI NX6800-TD128E (Single)	83.61
MSI NX6800-TD128E (6800 SLI)	115.86
MSI NX6600GT-TD128E (Single)	85.01
MSI NX6600GT-TD128E (SLI Mode)	113.95
MSI RX1800XT-VT2D512E	129.09
1600x1200:	FPS	Ranking
Gigabyte GV-RX18L256V-B	84.81
ATi Radeon X850 XT PE	83.89
MSI RX850XT-TD256E	79.39
MSI RX800XT-VTD256E	76.29
ATi Radeon X800 XL	67.28
PowerColor X700 Pro	36.78
MSI NX7800GTX-VT2D512E	117.45
MSI NX7800GTX-VT2D256E (Single)	104.25
MSI NX7800GTX-VT2D256E (SLI Mode)	128.46
Asus EN7800GT 2DHTV/256M/OSP/A (Single)	85.93
Asus EN7800GT 2DHTV/256M/OSP/A (SLI Mode)	114.31
MSI NX6800GT-T2D256E	65.73
MSI NX6800-TD128E (Single)	45.58
MSI NX6800-TD128E (6800 SLI)	76.45
MSI NX6600GT-TD128E (Single)	45.93
MSI NX6600GT-TD128E (SLI Mode)	75.2
MSI RX1800XT-VT2D512E	102.75

At lower resolutions, the MSI RX1800XT-VT2D512E is not able to separate itself from the rest of the crowd in Halo, but when the resolution is turned up to 1600x1200 the videocard outperforms the Radeon X1800 XL Gigabyte quite nicely. It's frame rates are slightly slower than the 256MB GeForce 7800GTX however.