Scanning for targets.
Forgot to post this yesterday. Oops! Anyway back on topic, this is a bit of a weird game because there really isn't much like it these days. It's a call back to games like Descent where you play a shooter with full range of motion in all axes. The most similar game I've played in recent memory is Shattered Horizon. I really like their fake computer look to the game, the first level also has a pretty great fake Windows desktop to start the game off with.
The shooting itself is decent, I haven't got deep enough into see how many more weapons there are or how complex the upgrade system gets. But it does look like there's going to be some variety in there. Playing a few other shooters recently and there's an odd lack of weight behind the gunfire in Retrovirus, which while it makes sense in context of the game makes it stand out a bit from more modern shooters. Enemies being able to attack you from all directions also makes the concept of taking cover a little tough. I would've liked some way to mitigate damage that didn't involve just running into a pipe to choke point the enemies. Some of the combat spaces give you lots of room to manoeuvre in but some are fairly small which makes dealing with the more punchy enemies rather tough.