This is not the fast-paced psytrance (I believe) a lot people think of when they hear "psytrance" but the slower kind. Many of the tracks are like taking a fast psytrance song and just slowing it down, putting it a bit in slow motion. Think "slow psytrance" and you'll get it!
And if you're not familiar at all with psytrance, it's electronic music with kick and bass combined into a trancy feeling with a lot of effects and weird psychedelic sounds. In my experience people often considering it as quite "dark", but that depends on what kind of psytrance it is since psytrance can be divided into plenty of subgenres.
At least a part of each track has to contain a classical rolling/trancy psybass-feel. Some tracks are more chill, some are quite heavy, most of them are below 120 bpm.