Sid Meiers' Alpha Centauri
best 4x ever imo, if you like civ you should really gives this a go, it's eaten about 10 hours of each week of my lfe since it was released
Characters and writing beyond anything thats been done before or since imo, game be good too
System Shock 2
Damn good, scared the hell out of me, and I still rate SHODAN as the best antagonist ever
Tactical JRPG goodness, mixing hard fights with compulsive pokemon style collecting and levelling to lvl1000 just because you can
Classic case of the whole being greater than it's sum, naff shooting, clunky stealth, ugly graphics (even back then), amazing game with amzing story and characters
Oh there was once a time when MMO worlds were living breathing worlds and not glorfied grind lobbies to get to an instance! Hail to the past!
And some MMOs still are the above! Internet spaceships are offcially serious business. The MMO that's kept me enslaved for the longest
X-com UFO defense
Unfair, unfeindly, unintuitive, goddamn amazing. Remake is good too.
JRPG style with viceral bicycle to face brawling action, with really good story and characters. AKA "Blowing all your cash on a handbag for a Hostess: The Game"
The plot stinks of "wtf" but really pays off (But I advise maybe checking on gamefaqs to make sure you dont get the early fail ending, otherwise the plot wil go nowhere) . Amzing character developement and imo it's still best classic style JRPG since the snes era.
The long transistion from pain to joy was one of themost rewarding things I have experienced in the current gen
STALKER Shadow of Chernobyl
Survival horror ARPG , good times with radiation.
And maybe FFVII and Little Big Adventure 2 Bbecause my 9yo self would stalk me through time and space if he realised I didn't mention them here.