What was your first Steam Purchase?

Valve complete pack

Orange box

the orange box. I bought it for 15 pounds and it still is the best investment I have ever made

A free Portal, when Steam gave it for free :D
Later, I bought CS:S + Gmod.

Trilogy of S.T.A.L.K.E.R.

COD:BO(Full price...T_T)and i regret that move to this day

Terraria the evening it came out.

Counter strike anthology, I bought it 5 years ago.

Left 4 Dead 2 !

Left 4 Dead 4 pack :)

CS 1.6 :) still love it :)

half-life (1) antology :D

L4D 2 :D

CoD:Mw3 :D

Counter strike source with Gmod

it was 15 $
I bought it just because I wanted to play TTT

Terraria, its the reason i got steam!

Dirt 3. I even got the 50% coupon from Steamgifts ^_^.

Psychonauts. At full price. And I've never regretted it.

CS Pack

Garry's Mod + Team Fortress 2

CS:S, and then it started, damn you steam...

Got Counter Strike Global Offenssive. Didnt bought it in steam though, I bought it at Datablitz (equal to Gamestop)

CS anthology

Portal 1 & 2 bundle

Half-Life 2 and Garry's Mod. I really just wanted Half-Life 2, but I got Garry's Mod because my brother said he was going to get it to play with me.