Peter: all four Surge upgrades - STORY SPOILERS
From Symbiote Yank, the Surge route is:
16. Surge: Don't Resist (1).
17. Surge: Ready to Glow (1).
18. Surge: Alien Harmony (2).
19. Surge: Power Spike (2).
Don't Resist improves how quickly you build the meter. Ready to Glow refills abilities after a complete Surge bar is spent. Alien Harmony extends the Surge window. Power Spike halves ability recharge time while Surge is active.
Together, these purchases reward actually using the mode rather than saving it through every encounter for some imaginary emergency. Spend your ready abilities, activate Surge at a useful moment, and keep using the abilities that recover inside that window. Watch what is happening around you instead of just hammering inputs because the screen looks impressive.
Late in the story Peter receives Anti-Venom powers. The relevant symbiote upgrades remain useful with their corresponding later versions. Changing a cosmetic black suit does not itself equip a different set of combat abilities, so check the Abilities screen if the move you expect isn't happening.
For the Surge trophy, the important part is using qualifying abilities while Surge is active. Twenty-five ordinary uses outside the mode won't satisfy it.
Peter: all four Surge upgrades - STORY SPOILERS
· Games / Marvel's Spider-Man 2