* q2dm1 - from q2 3.10 - 3.14 point release -- original physics -- hardly any jumps* q2dm1 - 3.15 point release -- new physics -- new! dozens of subtle, advanced, but learnable and achievable jumps that deepen gameplayOne of the most amazing and subtle accomplishments in human computer interface in FPS gaming ever!. . . And thus, when q3 slid backwards to pre-3.15 q2 physics, those of us who loved what the q2 3.15 physics had achieved with the expansion of high harmonics within the experiential possibilities of FPS gameplay, were disappointed.