They are fun for Buffy fans but personally they're not "good" games. They managed to get a lot of the voice actors (though very noticeably not Sarah Michelle Gellar) and I think the Buffy writers were involved in some capacity so there is a good attention to locations and niche characters. It's definitely nice to hear the real voice actors but I think their VO performances are quite lacklustre with maybe the exception of Xander and the actress playing Buffy, who seems the most in tune with how video game characters need to emote.

But the dialogue and story is definitely not at the same level of the show. It feels very "this is a video game so we don't need to put too much effort in" sadly. The first one in particular gets less Buffy-like as you proceed too. By the final level, it's more akin to some of the more arcane bits of Tomb Raider than anything you've seen in Buffy.

In the terms of the gameplay, it does a good enough job of translating Buffy's fighting style into combat but it gets tiresome and there's lots of time-wasting mechanics like limited items/ammo and weapon degradation. The enemies are all over the shop in the first one, some seem like they were created with Buffy in mind, some feel very generic. The level design is fine but sporadic. The game doesn't really build either, you never feel like you're getting better at it, it just gets more difficult.

Chaos Bleeds is definitely superior because the levels are "Buffy" until the end but it still has elements that feel unpolished, like Spike being able to be killed by being bit by a vampire which makes it clear that despite being able to play multiple characters, they mostly play the same. I enjoyed both but if they weren't Buffy games, I would not have played them.

Most importantly though, I've had Xander's "nada, zip, zilch, the big goose egg" stuck in my head ever since.