Insision take on the dying underground by combining brutal death metal, early technical death metal and adding in mild touches of modern death metal, creating a sound that hammers its listeners with intensity but works melodic leads and song construction into the mix for variety and depth. The result is a cornucopia of charging riffs and melodic turnarounds, in a style similar to later Gorguts mixed with Deeds of Flesh.
The band makes skillful use of dynamics to intensify songs and carefully presents each as a standalone concept. Guttural vocals ride the rhythm riff but break away to freestyle over the more open patterns. This allows Insision to work atmosphere into the blasting and otherwise violent guitar work. Fans of classic German speed metal like Destruction and Kreator will notice similarities as the album goes on; like the best from those bands, Terminal Reckoning uses single chord riffs with chromatic fills for pure rhythm effect.
If this album could improve, it would be in more internal diversity of riff and pace. Its use of melody thrusts aside the modern metal conventions and instead serves to develop songs, which avoids the becalming effect of too much similarity, and the interplay of vocals and guitar follows the mid-80s style instead of trying to constantly contrast the riffs. That and its inherent aggressive attack allows this album to escape the modern metal doldrums and bring back much of what fans adored in old school, technical and brutal death metal.