This was a precursor to Battlefleet Gothic, and a game I didn’t even know about until last week.
A full review on DakkaDakka covers it well and good. A blog I also happen to follow, Leadplague cover the game.
The style of the tyranids in Space Fleet is super cool and super distinct. I’ve never seen their space forces depicted with mollusk like aesthetics before. The tendrils are very creepy. I’m a 3e baby, and know of 'nid fleets as more or less their current form, and only have knowledge of the 2e ground forces of 'nids.
I swear Olden Demon browses /tg/ because he just released a teaser video on his channel which shows tyranid ships represented in the distinctive mollusk style (1:10 into the video) which is as far as I know unique to Space Fleet, and the unique mollusk aesthetic was brought up on /tg/'s GROG thread last week along with Space Fleet just before the teaser dropped.