Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Points
"I'll be back"	Survive your first A.I. Encounter	10
1 GB	Collect 1,048,576 Kb in Endless Mode	60
256 MB	Collect 262,144 Kb in Endless Mode	30
512 MB	Collect 524,228 Kb in Endless Mode	40
Backdoor Access	Hack your first Backdoor	10
Breach	Annihilate Mainframe defences	30
Brute Force	Obtain the maximum level weapon in Endless Mode	30
Champions don't use drugs	Collect 100 power-ups	25
Cybernaut	Complete the Arcade Mode for the first time	100
Debris Master	Destroy 200 yellow debris	50
Facehugger	Defeat the Facehugger for the first time	15
Firewalker	Hack a Backdoor in Endless Mode	25
Initialized	Destroy your first enemy	5
Laserdisk 24X	Gain a x24 multiplier in Arcade Mode	15
Laserdisk 32X	Gain a x32 multiplier in Arcade Mode	25
Mainframe Access	Access the Mainframe for the first time	20
Mirror Master	Make 100 bullets bounce	35
Neuromancer	Complete the Arcade Mode without using any Backdoor	150
SYSTAdmin	Access the 10th Mainframe Sector in Endless Mode	50
Sector [5]	Access the 5th Mainframe Sector in Endless Mode	30
Security Expert	Obtain the maximum level shield	30
Stack Overflow	Survive at least 10 minutes in Endless Mode	100
Survivor	Survive at least 5 minutes in Endless Mode	50
System Access	Access the 1st Mainframe Sector in Endless Mode	15
Terminator	Kill at least 100 enemies	50