Last time I checked, there were three different Serious Sam VR games you could buy. Of the 3 currently available, I think I like this one the best. First off, it's not designed specifically as a wave shooter like Last Hope. While Last Hope is a perfectly capable wave shooter, I prefer this version because of the large sprawling worlds to explore. You can use trackpad locomotion to move about and enjoy the campaign. Croteam has also provided tons of various graphical settings for you to play with, so you can dial in the experience for your particular configuration. The game also has very solid multiplayer support. There usually is other people to play with, so you're not stuck waiting around in a lobby forever.
Rating - 85
(HTC Vive version reviewed)