"This was very fun to make. Used Garry's Mod and getpaint.net for the background, text and post processing effects.

GMod addons and TF2 Hex cosmetics:

Easy Bonemerge
Le Communicateur
The Wildcat
Counter Espionage
Tripplecrosser's Touch
Australium Festive Ambassador

Credits to the creators of these cosmetics and weapon:
TwoTonMoon and Dangerous Feksil (Le Communicateur & The Wildcat)
Colteh and MultiTrip (Counter Espionage)
Big Bob and Sedimentary Socks (Tripplecrosser's Touch)
Hawkshadow741 (Australium Festive Ambassador)

And the guys who hexed them all into GMod:
Jintei (Counter Espionage & Australium Festive Ambassador)
Yakuza Merkitzi (All the rest)

Major's Mark (RED spy's torso cosmetic) is already included in TF2, but can be located in GMod's spawnmenu through:

Games>Team Forteess 2>Workshop>Player>Items>Spy>Majors_Mark"