Soul Blade (1996, PSone)
Before Soul Calibur was called Soul Calibur, it was Soul Edge or Soul Blade, depending where you bought it. Not only did it feature full 3D backgrounds (a breakthrough for 3D console fighters at the time), but a stage set on a raft in rapids. And it tilts. Amazing. Today, of course, it looks sketchy, but poor PSone must have been sweating like a pig to pull this one off. And yes, you can knock your opponent into it. Sploosh!
Above: It's a bit pixellated on the surface, but the fact it was there at all is a miracle of programming
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