After UFO Enemy unknown they made X-com terror from the deep. X-com apocalypse. X-com interceptor and X-com Em@il. The Email one was ok but the interceptor game was crud beyond recognition.
As for turrican. If you made it tekken style it'd fit way too little on the screen at the time since the figure fills up a darn lot of the screen. If you want a shooting platformer where you see some 3D but still feel like a 2D then I think I've mentioned it way too much because I like the game.
I would really like to see a followup on Abe's oddysee ON PC (Damn you MS for buying off the team to make it X-box exclusive). Also a new Flashback. I'm not talking 3D flashback like F2B but a classic platformer with a little different plot.