On the not shoot 'em up theme, I love:
Monopoly Casino
Star Wars Monopoly
Q-Bert
I know they aren’t the most facinating, but they’re great for killing time, and quite addicting 
Zette
Love is like popsicles…you get too much you get too high.
Not enough and you’re gonna die…
Click here for some GOOD news for a change Zettecity
The GAME OF THE YEAR according to Computer Gaming World is Unreal Tournament. I haven’t played it but it does sound great with good multiplayer capability over the net. I have played Half Life Game of the Year Edition which is one of the best games I’ve played. It too has multiplayer gaming over the net. One of my favorites was Heroes of Might and Magic II there is a III out now which I assume is even better.
I would recommend Close Combat 3. It’s simulator of small-scale (50 to 100 men) battles that took place during World War 2. It’s very realistic and completely different from most war games. It’s more of a simulation than a game. Very, very addictive.
Are you sure you don’t mean Day Of The Tentacle? If so, I agree that that game is hilarious. Another good recommendation in that area would be Sam & Max Hit The Road, but both of those may be hard to find.
And as for current games, I’m addicted to The Sims at the moment. It’s not the game I’d buy if I wanted to show off my system, but who cares if it does or not? It’s a great game, and that’s all that matters. Highly recommended for anyone into god games.
Mr. Armageddon
“Just when you thought you had all the answers, I went and changed the questions!”–Roddy Piper
If you really want to show off your system try Hidden and Dangerous by Talonsoft. It’s an awesome WW2 Real time sim. It’s jumpy at times on my P3-450 so you can be certain it’s stretching your system to the limit. It looks really nice graphically as well.
Flight sims are a particular love of mine. If you have a decent joystick, check out “European Air War” from Microprose. You can fly any of 20 different fighters or fighter-bombers for the USAAF, the RAF, or the Luftwaffe. Excellent graphics and Dolby surround sound are treats!
I don’t know why fortune smiles on some and lets the rest go free…
T
<font size=7>THE SIMS!!</font>
Starseige: Tribes
RollerCoaster Tycoon
Well, either you’re closing your eyes to a situation you do not wish to acknowledge or you are not aware of the power of the presence of a pool table in your community. Ya’ got trouble my friends! -
Prof. Harold Hill
Gary Conservatory
Gold Medal Class
'05
Nothing beats Tetris. 
A few people have mentioned Lucasarts’ graphic adventures (Maniac Mansion: Day of the Tentacle, Grim Fandango, others). While these aren’t the games to get if you want a system tester, they ARE some of the greatest games ever made. For over 10 years, Lucasarts has been making adventure games, and most are great. I recommend The Secret of Monkey Island (All 3 in the series), both Maniac Mansions, Sam & Max Hit the Road, and Grim Fandango (although I’m sure I’m forgetting some). You can buy them all, even the older ones, on lucasarts.com)
For newer games, both Quake3 and Unreal Tournament are great (they play fairly differently, though, and don’t let anyone tell you otherwise.). Half-Life is a given (if you play online, be sure to get Counter-Strike (www.counter-strike.net). The Sims is great if you are into sim-type games. If you play multiplayer games, Starsiege: Tribes is awesome, although its well over a year old now.
My top choices by genre:
RPG: Planescape Torment
FPS: Unreal Tournament
Online FPS: Quake 3
FPRPG: System Shock 2
RTS: Starcraft
ISS: Dungeon Keeper 2
GRS: Mechwarrior 3
MMORPG: Everquest (Nice knowing you)
Other Must Plays are Baldur’s Gate, Half Life, and Homeworld (So I hear).
I’m not qualified to comment on sports games or military sims.
(Role Playing Game, First Person Shooter, First Person Role Playing Game, Real Time Strategy, Imp Slapping Simulation, Giant Robot Simulation, Massively Multiplayer Online Role Playing Game)
http://www.madpoet.com
Clerks - Just because they serve you doesn’t mean they like you.
I’m surprised that no one has mentioned Homeworld. It’s fantastic, and unlike anything else I’ve ever seen. It’s a real-time strategy game, like Starcraft, but it’s a space battle in 3D. You’ll be awed by what it looks like on a good system.
Never attribute to an -ism anything more easily explained by common, human stupidity.
Ah, at last a subject I know something about!
If you like Half-Life, I suggest you take a look at System Shock 2, which is a combination horror/sci-fi game. It’s primarily a first-person shooter, but it has a lot of RPG elements, and your character’s abilities increase as you advance through the plot. From what I’ve seen of Half-Life, the two games’ play control and pacing are almost identical.
I’ll also add my voice to the recommendations for Unreal Tournament and Dungeon Keeper 2.
DK2 is a unique sort of real-time strategy game. The graphics are great, the sound work is outstanding, and the single-player campaign is challenging but finishable.
UT is a fairly straightforward first-person shooter, but it is the best that genre has produced in quite a while. It will definitely push your graphics hardware to its limits; for audio, it supports full 3d surround sound if you have the setup. Admittedly, it doesn’t have much plot beyond “kill your enemies and capture the objective”, but it’s still extremely fun.
(If it means anything to you, I work at a video game company, and my co-workers and I have played multiplayer UT every day for the past couple of weeks.)
Oh, I forgot the obligatory plug for my company’s major game. If you like fantasy RPGs, and would like to play with several thousand people at a time, buy a copy of EverQuest. Just be warned: the game is very addictive, and many people spend far too much time on it.
Be warned also that you need a credit card and ten bucks a month to play Everquest. It’s kind of stupid, paying $45 for a game you’ll have to pay $10 every month to play. My cousin has a copy of it lying on his shelf collecting dust because he doesn’t have a credit card.
To Mr Armageddon: Thankee sir. Explains why I can never find the blighted thing in the shops, now doesn’t it?
(subvocal - how many people have I recommended the wrong damn game to?)