I'd also guess Mindwalker was first - but I have heard others given that title. EA's Kelidescope came in the box of early Amiga 1000s.
For "ported to Amiga," I'd say Hex by Mark of the Unicorn.
For "ported from Amiga," I'd say Alien Fires.
These are wild guesses, but I'm basing them on the RAM requirements of 256K, which at least place them as early A1000 titles.
Also, titles that ran on 1.1 and did not run on 1.2 are bound to be very early titles.
EA's 1-on-1 was an early 256K 1.1 only game.
"E. A. Sports. It's in the game!"
