I too was a bit disappointed by Kabuto. Not a BAD game, despite somehow same-y mission structure for first two "races" I had a decent amount of fun. Delphi's jump is one of the more fun mechanics I've seen in games despite being just a, well, jump. What kinda killed for me was the last part though, playing the Kabuto. It just wasn't the big monster smash rampage I expected it to be. And controlling his spawns was annoying to the point of them being absolutely worthless. And any time you weren't using a sprint it was just painful to move around.
Another thing was humor which was kinda hit and miss for me. But that's purely subjective.
Still, I do recommend the game for that price, if nothing else just to check out what kind of games were being made back in the days. Also, can't comment on that part, but I wager multiplayer might be quite fun.
Also, from what I played, Shogo is a bit weird one. Intro is in a vein of a horribly cheesy 90's anime intro song, cheesy to the point of self parody. I found mech fights to be quite fun in their fast paced way. The fps part though... computer wall-hacks. Wall-hacks BAD. But strange enough, the challenge made the game kinda fun for me.
Sacrifice is interesting, but it has it's own problems, namely control scheme will take you some time to get used to. And I still haven't figure out how to play it properly, been stuck on 2nd mission for ever.
Evolva is fun, get it.
Actually, I could say almost all games on the list are worth getting, can't vouch only for those I haven't played. However, do note Interplay games go on sale fairly often at GoG AND it's only 60% sale this time. There have been better deals. I'd say don't bother with it this time.