Precursor of a Humble Weekly Sale? Perhaps. But nevertheless, 80% off is a rare sight on Steam.
Trine 2 Complete Story contains the base Trine 2 game, the expansion DLC Goblin Menace, as well as the previously Wii U exclusive level Dwarven Caverns.
If you're a fan of platformers, this is definitely worth trying. The original Trine as well as the Trine Complete Collection bundle are also 80% off.
$19.99 $3.99 USD for Trine 2 Complete Story
$39.99 $7.99 USD for Trine 2 Complete Story 3-pack (can only be bought if you do not own Trine 2/Trine 2 Complete Story already - when bought, you'll get one copy instantly activated in your Steam account and 2 gift copies)
$24.99 $4.99 USD for Trine Complete Collection bundle (comprises Trine & Trine 2 Complete Story)
$9.99 $1.99 USD for Trine
The only downside is for those that only have Trine 2, as to upgrade to the Complete Story, it still costs a full $4.99 USD. If you bought Trine 2's Goblin Menace DLC prior to the Complete Story version being released, you get a free upgrade to it.
woot : All owners of Trine 2: Goblin Menace are automatically upgraded to the Complete Story edition.