Best Game < $15

I was wondering if anyone had any opinions as to what they thought the best game on Steam was for under $15 USD. Speaking in terms of quality of the game and overall value, does anyone have any suggestions?
 
In my opinion, I would probably go with Half Life, Max Payne, Sid Meier's Pirates!, and Tom Clancy's Splinter Cell: Chaos Theory

You ever play Doom 1/2?

Deus Ex and X-Com = $15

Braid is a kick ass game for under $15.

Plants vs. Zombies, bro. If you're willing to throw in an extra $5, you also got Torchlight.

" I was wondering if anyone had any opinions as to what they thought the best game on Steam was for under $15 USD. Speaking in terms of quality of the game and overall value, does anyone have any suggestions?  In my opinion, I would probably go with Half Life, Max Payne, Sid Meier's Pirates!, and Tom Clancy's Splinter Cell: Chaos Theory "

Is S.T.A.L.K.E.R: Shadow of Chernobyl still cheap? If so get that for sure. Next up, probably Braid.

" Is S.T.A.L.K.E.R: Shadow of Chernobyl still cheap? If so get that for sure. Next up, probably Braid. "

I liked Braid, but it was really frustrating to get through haha.
 
 @EpicSteve:  Is Plants vs. Zombies really that good? I'll need to look into it more...

Plants vs. Zombies is my new obsession.

Half-Life, but you'd be best served getting that game in one of the many, many bundles it comes in. However, I believe that buying Half-Life also nets you both of its expansion packs for free as well, these days, which makes the value all the sweeter. Also, that would net you any of the free mods available for it online, and there are many quality ones.

Plants vs Zombies is pretty cool if you like Tower Defense Games.   
 
But I would still would recommend X-Com(One of the best Turn Based strategy games ever made, and my personal favorite game of all time.)  And Deus Ex.  One of the first(?) RPG/FPS hybrids that many consider to be the best game of all time.  Right there, you got two epic games.  $15.
 
Edit:  Regarding buying the original Half Life.  It would be best to wait for Black Mesa Source.  A complete remake of the original Half Life with the Source engine(HL2.)

Plants vs Zombies is pretty cool if you like Tower Defense Games.

" Half-Life, but you'd be best served getting that game in one of the many, many bundles it comes in. However, I believe that buying Half-Life also nets you both of its expansion packs for free as well, these days, which makes the value all the sweeter. Also, that would net you any of the free mods available for it online, and there are many quality ones. "

" I liked Braid, but it was really frustrating to get through haha.
 
 @EpicSteve:  Is Plants vs. Zombies really that good? I'll need to look into it more... "

 
@Chyro: I remember hearing about Deus Ex when it first came out, but I never actually played it. Perhaps now is the time. "

ahh psychonauts. good ol' tim schafer.

I saw Orange Box for $15 once, I think. Now that's an epic deal.

" Deus Ex and X-Com = $15 "

" @BigLemon: Thanks! Good Eats is, in my opinion, the most well put together half hour on television. "