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