Here is the full list of all 45 Spider-Man: Web of Shadows achievements worth 1,000 gamerscore.
50 Hit Combo “Spider Silk” executed
Half of All Optional Goals completed
100 Collectibles found
Symbiote Black Cat defeated
Symbiote Wolverine Defeated
Spent time with Black Cat
Red Suit Conclusion earned
Black Suit Conclusion earned
Black Cat Conclusion achieved
100 enemies parried then counter attacked
First Black Suit Choice
Game Completed
Mary Jane Conclusion achieved
Symbiote Vulture Defeated
60 Bonus Goals completed
All Upgrades purchased
Symbiote Electro defeated
20 Enemies Web-Strike Bounced in succession
Act Two completed
Electro defeated
250 Hit Combo “Neighborly” executed
Defeated 50 Enemies using only Wall Combos
Defeated Venom twice
Wolverine defeated
100 Hit Combo “Ownership” executed
Vulture defeated
1000 Enemies defeated
First Tech Mech defeated
Tech Mech Pilot pulled from his seat
Performed all three types of attacks (Ground, Air, Wall) on a single enemy 10 times
Spider-Man Maxed Out
Half of all Collectibles found
500 Enemies defeated
50 Enemies defeated using only Air Combos
100 City Crimes thwarted
Black Cat defeated
Black Cat Spurned
1 enemy parried then counter attacked
Act One completed
First Red Suit Choice
5 Enemies Web Swing-Kicked in a single pass
25 City Crimes thwarted
100 Enemies defeated
50 Enemies defeated using only Ground Combos
Defeated Venom once