Skills, suits, and gadget purchases
33. Superior Spider-Man: buy the full skill tree. That is 34 nodes costing 49 points, obtainable by level 50 in a normal run.
34. The Scientific Method: craft a gadget upgrade.
35. Science FTW!: craft 15 gadget upgrades. Suit mods are a different system and don't replace those purchases.
36. Snappy Dresser: wear five new suits.
37. A Suit For All Seasons: purchase the required original suit set.
That last requirement is not asking for every costume ever added to Remastered. DLC rewards and free-update outfits aren't an extra condition for the base platinum. You also don't need the ESU secret-photo suit for it.
My recommendation is to check the remaining suit costs before spending your last Challenge tokens on upgrades you don't need yet. If you're going for every Remastered achievement, you will eventually need all gadget upgrades as well. Plan to earn enough materials for both instead of treating a trophy unlock as proof that the entire collection is finished.
Skills, suits, and gadget purchases
· Games / Marvel's Spider-Man