It's really not very good, though I'm happy to have played through it one more time. It did a few interesting things for the time but 14 years on it's a pretty painful experience when looking at things like shooting, platforming and the whole target lockon system. The field of view is way too tight, not helped by it being 4:3 only, movement is slow and clunky with some bafflingly long sections of just walking slowly through large featureless corridors or fields (there's a hugely annoying jumping puzzle bit near the end), and it's very easy to get disoriented with the hit reactions - all downsides of the game design in their own way.

At the same time though, there's cool stuff there that you can see struggling to get out; the forced perspective means that they can play with your perceptions with hallucinations (something which they needed to do way more of) and it "solves" the problem of the player not looking where he wants by just jerking your view over. The start is particularly good at this but they just didn't take enough advantage; there's hardly anything you can interact with that isn't essential to the plot, it gets too concerned with its own cleverness when picking up items and the whole thing feels like it was drastically cut back.

In the end, while it starts strong it just kind of sags towards the middle and doesn't really pay off in the end with the time travel plot. The horrible nu metal ending theme is still very much present in the credits though, so that's something to look forward to at the end of 6-7 hours I guess? I'd recommend that if anyone does play it, do it in easy. There's one encounter near the end which I remember spending hours bashing my head against but I just walked through it this time.