Complete the following achievements to unlock Xbox Live Gamerscore points. 

100 Hit Combo Ownership (25 points) - Execute 100 Hit Combo "Ownership".
250 Hit Combo Neighborly (50 points) - Execute 250 Hit Combo "Neighborly".
50 Hit Combo Spider Silk (10 points) - Execute 50 Hit Combo "Spider Silk".
Air Combo Skill (15 points) - Defeat 50 Enemies using only Air Combos. 
Bowling Ball (5 points) - Web Swing-Kick 5 Enemies in a single pass. 
Complete Story, Act One (50 points) - Complete Act One. 
Complete Story, Act Two (50 points) - Complete Act Two. 
Complete Web of Shadows (75 points) - Complete Game. 
Defeat 100 Enemies (20 points) - Defeat 100 Enemies. 
Defeat 500 Enemies (35 points) - Defeat 500 Enemies. 
Encountered (5 points) - Parry then Counter Attack one enemy. 
Eviction (5 points) - Pull Tech Mech Pilot from his seat. 
Excessive Spider-Man (15 points) - Complete Half of All Optional Goals. 
First One Hundred (15 points) - Find 100 Collectibles. 
Great Power (10 points) - Thwart 25 City Crimes. 
Great Responsibility (25 points) - Thwart 100 City Crimes. 
Ground Combo Skill (15 points) - Defeat 50 Enemies using only Ground Combos.
Heroic Accumulation (25 points) - Find Half of all Collectibles. 
Max Out Spider-Man (75 points) - Max Out Spider-Man. 
No Sweat (50 points) - Defeat 1000 Enemies. 
Obsessive Spider-Man (25 points) - Complete 60 Bonus Goals. 
Over the Counter (10 points) - Parry then Counter Attack 100 enemies. 
The Bigger They Come... (5 points) - Defeat First Tech Mech. 
Trampoline (25 points) - Web-Strike Bounce 20 Enemies in succession. 
Ultimate Spider-Man (50 points) - Purchase all Upgrades. 
Wall Combo Skill (15 points) - Defeat 50 Enemies using only Wall Combos.