had to be "Operation Wolf" and "Robocop".

Wow, they were just so cool.

Yes, even the humble Spectrum 128K made those games truly wonderful.

Spectrum
----------
Jet Set Willy II
Halls Of The Things
Fred

Atari ST
----------
Sim City
Dungeon Master
Populous 2
Pacific Islands
International Karate

PC (Not retro)
---
Magic Carpet
Open TTDX
Diablo I & II

Some true classic games for various consoles/computers include (in my opinion):

Amiga 600-

Another World

Street Fighter series

Mortal Combat series

Gameboy-

Tetris

Super Mario Brothers

PC-

Doom

Sims

Playstation/Playstation 2-

GTA (3-5)

Resident Evil series

Silent Hill series

Hitman series

Smackdown (vs Raw) series

Tekken series

Crash Bandicoot series

Fighting Force

Tomb Raider series

My particular favorite is GTA, especially no. 5 due to the sheer enormity of the game plus the variety of things to do within it

It's one of those games that you can play all-year-round and still find new things to do

The retro game i played the most was on the atari and called 'dodge-em' it was a bit similar to pacman, drive a car around a grid driving over dots, there was 2 computer cars driving the opposite way to you.

another oldie game was pitstop 2 on the commodore 64, you needed to stop in the pits to change tyres and add fuel. it was so advanced for its time.

yes gta 5 san andreas is brilliant, i keep looking for news of a gta6, the liberty city stories was such a disappointment.

PC games i currently play total war a lot, shogun, medieval and rome. cant wait for medieval 2 to come out.

Used to play americas army. aint played for nearly 2 years now but im still ranked 3rd in the world. http://aaotracker.com/userranklist.php. and i still get emails from people asking me to join their clan, if only i had time.

I loved Operation Wolf too. Last year I downloaded a torrent containing a SNES emulator and about a meeeellion games (or roms as they're called.) Operation Wolf is one of them.

My favourite game of all time is Elite, which I played for years, literally, in the 1980s.

I also loved:

Dune 2
Wolfenstein 3D
Duke Nukem
Syndicate

My favourite recent games are:

Farcry
Grand Theft Auto: Vice City
Flight Simulator 2002
Hitman: Codename 48
Hitman: Contracts

i'm re-playing Fallout 2 on PC and

I'm playing tons of games on Playstation 2 right now...

LOL

GTA vice city
GTA san andreas
DBZ budokai tenkaichi 2
DBZ budokai tenkaichi 3
Mortal Kombat Armageddon
Turok Evolution
Half Life
ManHunt

and more !