I've been super into VR this year. Next to my PC it's easily my most played platform these days. I bought the Serious Sam VR bundle in the steam autumn sale because it was extremely cheap and boy, lemme tell ya, Serious Sam is a much better game in VR. It's definitely old, and you can tell it was originally made for Vive controllers without joysticks, but it works fine with modern VR controllers like the Oculus Touch so it's not really a problem after a few tweaks. More importantly, playing it this way ends up giving you several improvements, some of which might not have even been intentional.
1) You can dual wield any gun as soon as you pick it up. You can also use a different gun in each hand. It opens up some new strategies.
2) Since you can free aim in any direction crowds are much less tedious to deal with than in the flat version so you're not just hitting S on the keyboard while holding down M1 the whole time. You can also shoot enemy projectiles out of the air much more easily, especially if you're dual wielding a pistol or assault rifle in one hand specifically for that purpose while using your other hand to deal damage.
3) Enemy health is NOT adjusted to take dual wielding into account, so everything dies faster. It really doesn't make the game too easy because you still have dozens and dozens of them coming at you in every wave. It just means battles don't overstay their welcome anymore.
4) Since you can free aim that means you can sweep the flamethrower back and forth in front of you to make a giant fiery wall of death instead of just aiming it in a straight line.
5) The sniper rifle is used by actually looking through the scope, so you can maintain situational awareness around yourself while sniping rather than having a big black circle blinding your peripheral vision.
6) The revolvers and the shotgun can fire as fast as you can pull the trigger, so if you're quick these basic weapons become absolute death dealers.
Not bad for 2.99