I gave this one a shot, but I just couldn't quite get into it. At its core, Terminus Reach is a sci-fi VN in which you play as Commander Shepard's less charismatic and more edgelord younger brother. Unfortunately, it's just not really good enough at anything to be a real gem.
The renders are dated at best and outright ugly at worst. I wasn't really a fan of them as bald isn't my favorite look and the aliens are quite unattractive. The animations, such as they are, are still images pushed together and repeated to create a stop motion-like effect. It's not great, nor are the sex sequences.
The story is much better, but still falls short. In a strange sort of way, I feel it's because of the porn. There's an interesting sort of political thriller if you dig around the unnecessary harem. Unfortunately, the harem really takes time away from the political machinations, which is rough as the story and alien societies complex and need all the screen time they can get to make sense. As is, it can feel a bit dense and confusing.
Stacked on this issue is the main character. Edgelord is truly the most applicable term. The core of his character is an assassin with a heart of gold who doesn't care about anyone... except his girlfriend, his friends, the people of the station... so okay a lot of people. But still, he'll kill anyone in cold blood who threatens any of those people and joke about it while doing it. I think it's immediately obvious how that character is unnecessarily edgy for the sake of edge. Add a few bonus points for him being the closest thing to god in the setting and we have a real problem child.
In summary, Terminus Reach strikes me as a reasonably decent VN that suffered from adding porn. Without porn there'd be no issues with unattractive aliens/females, more focus on the fairly good political drama, and a slightly more reasonable main character. However, the game does feature porn and everything is weaker for its inclusion.