Trinity on the C128. Loved this game. I was hooked. I am an ex-C128 adventure game player. I am also an ex amiga, mac and ex ps2 gamer. I like my Nintendo Dsi XL now. All my games play on it and I love the interactive screen.
Not all platforms are for all people - but for me games like "The last Window" on my Dsi XL are the ultimate gaming experience.
BUT - in its day the C128 with Infocom adventure games were an amazing gaming experience.