Reading over the past few pages i forgot some important ones;
Realising that wind waker takes place hundreds or thousands of years after the other games and in a post apocalyptic setting - only discussing the zelda series recently made me realise how ballsy this was of Nintendo; on the same level as Majora's, if not more so.
A lot of if not all of Metroid Prime; but maybe the first one was the condensation on the visor; also mass effect, first proper RPG, everything about it, didnt care for ME2 and as such i'm not going to play ME3 but i've played through ME three times, excellent - and skyrim, first elder scrolls game and maybe only second RPG, the sense of exploration and choice appeared endless, the world was magnificent
One of the biggest mind blowing games for me was Deus Ex, a friend told me to play it and i didnt think i'd like it but the freedom of this game is insane, i'm sure there are like seven vaguely set out paths - where most games have three rigid paths - but the fact they knew i'd try one of them - it felt like the game was being written as i played it - i've never had that since, truly mindblowing.
I remember two instances; one, the cops are coming to get you in your apartment, my friend and i were talking about the game after and he said he ran out and had a shootout, but i stayed in the apartment and waited, then ran into the bathroom, heard the cops come in and look for me, then i jumped out the bathroom window. Something like that, its been ages since i played it, but the fact we could have two completely different experiences was amazing to me
Another was accidentally shooting a fairly important main character early on and dropping the controller and thinking everything would restart - but it just continued and the game reacted to me; utterly blew me away, like i said no other game has done that