Winterheart by Goddamnhella (Pre Avengers, Loki cursed as a Frostgiant, isolated winter castle, Tony/Clint/Nat all stuck together with Loki... fun banter and unique twist on the age old classic of beauty and the beast.)
Off the Record by Goddamnhella (Post Avengers, Loki up to his old shenanigans in the tower, playing cat and mouse with Tony, things heat up, nicely written)
Just a Rose on a Star by road_of_ruin (Just a beautifully written fluff/story-building piece between Tony and Loki. Sad to see it end)
Shades of Green by Gemsir (Loki and Tony end up stranded together on a desert island, story builds, they find moments of cuteness and sexy-times together. Turns lovely and sentimental. Nice read!)
Bend Around the Wind by Nordremo (A massive fanfiction, 100 chapters, very well developed, unique story-line, great banter and fluff, sexy times, really invested story-line. Two somehow get trapped in a space prison like area, escape, Firefly-it for awhile, build a relationship, various other unique characters, cuteness)
...there is another one I am having a difficult time finding (please help) where Tony and Loki are kidnapped and thrown in a prison cell together, naked, blind folded, and bound... Tony doesn’t know its Loki, sexy-times happen, etc... anyone know what I’m talking about?