It runs ok on my 060 in low rez so I wouldn't want to try it with anything slower.
Me to, I would give it a go as long as runable even if a small window, id play on a bigger screen to compensate 
I don't have a RTC card, but when saying window I do not mean Windows mode, I ment shrinking the view area as in most Amiga FPS games.
Ive tried that without luck, bit I am sure ive read trough the years that it should be possible somehow :S