GameFocus writes: "As mentioned earlier, Tecmo Koei is trying to offer something different. Last year’s merger may have affected the Tecmo name (although the only good franchises they have are Ninja Gaiden and DOA) but as a new entity, the idea and willingness to create new experiences is more than welcomed. In the end, Quantum Theory may not be as detailed, vibrant, engaging and breathtaking as one would have hoped but it does offer a certain enjoyment despite its visible flaws."
+ Dynamic environments
+ Non-stop action
+ Solid cover system despite a few nitpicks
- Dumb AI
- Linear and uninspired level design
- No online co-op
- Subpar plot, laughable voice-over work