The game itself is not very long. But it's fun. I don't know why it's so underrated. You play as a soldier who needs to get off a Vorus vessel and you have to kill thousands of Vorus soldiers. There are also some bosses who pose problems. You have to pay attention to find their weak spots.
The game is playable if you do some tweaks to it. Otherwise it might stutter or lag.
Overall it's a brainless shooter for fun.