Pre-order Rift, Get... TF2 Weapons?

Unlikely commercial crossover of the month goes to Valve and Trion Worlds, who have set up a deal whereby people who pre-order the forthcoming fantasy MMO Rift will get exclusive melee weapons in Team Fortress 2: a "Sharpened Volcano Fragment" for the pyro and the "Sun-on-a-stick" for the Scout. There's also a new TF2 achievement being added to the game, called "Riftwalker", which you can earn to unlock a hat based on a frightening looking head-garment (pictured) that appears in Rift.

Presumably this won't be the last time we will see creepy hats appear as consumer-incentives in TF2.