Sonic adventure is a great game that has gotten ♥♥♥♥♥♥ ports over the years, which makes people think that the game is a glitchy mess, speacially the steam version since it's a port (DC to GC) of a port (2004 pc) of a port (ps3/xbox 360) so it's quite a mess.
But now thanks to the modding community the game has gotten a huge improvement in quality, It's not perfect, but it's way better than what sega has realese.
It's really fun you will have fun speedrunning the levels.
Just beware that some characters gameplay might be boring.

Sonic adventure is a great game that has gotten shitty ports over the years, which makes people think that the game is a glitchy mess, speacially the steam version since it's a port (DC to GC) of a port (2004 pc) of a port (ps3/xbox 360) so it's quite a mess. But now thanks to the modding community the game has gotten a huge improvement in quality, It's not perfect, but it's way better than what sega has realese. It's really fun you will have fun speedrunning the levels. Just beware that some characters gameplay might be boring.