That's fancy tech talk for 'you can wear those red-cyan cardboard glasses'. The EU release includes a pair in the box, however the US doesn't it seems.
While you can enjoy full stereoscopic 3D if you've got the TV set to match, SEGA decided to throw a bone to the greater majority with only two-dimensional capable TVs. The anaglyphic method uses the old cardboard red-cyan glasses, which discolour images a bit.
The House of the Dead: Overkill Extended Cut releases on PS3 October 28th.