Top 5 wow factor games?

In no order and in recent memory, it would have to be:

STALKER

Gish

Aquaria

Supreme Commander

Portal

^ Triple Word SCORE!

Top 5 wow games:

Witcher

BF2

CoH

Portal

HL2 (Series)

Crysis/Crysis Warhead

STALKER

RE 4 (gamecube)

RE Remake (gamecube)

Orange Box

Top 5 wow factor games, let me see...

Half-Life 2 (even though I hate Valve, after playing HL2 I was just like... wow...)

Fallout 1

CoD4

And from the games I've played, there are no more games with the same type of wow factor, so... make it a top 3.

Crysis

Fallout

Portal

Half Life 2: Episode 2

Supreme Commander (Building up lots of defences and feeling invincible only to have them ripped apart by a couple of spiderbots is highly frustrating, but still a major WOW moment.)

Gothic 3

Dead Space (Amazingly good for an EA game. Reminded me of a lot of movies I watched.)

Supreme Commander (Strategic zoom ruined other RTSs for me)

System Shock 2 (Simply a great game)

Battlefield 1942 (Best multiplayer FPS. It's a lot more fun to play 1942 or BF2 with friends than CS:S).

Audiosurf

STALKER Shadow of chernobyl

Portal

Witcher Enhanced

Fallout 3

Crysis