Accomplish the indicated achievement to get the corresponding number
of Gamerscore points:

A Friend in Need (20 points): Play Co-op mode.
Leap of Faith (15 points): Catch Totec with the grapple while he
is jumping over a death fall.
Return to sender (15 points): Reflect an enemy's projectile back
to him using Totec's shield.
Three birds, one stone (10 points): Kill 3 enemies with one bomb.
Jump Jump (10 points): Jump from Totec's shield while he is jumping.
Beat a better mousetrap (10 points): Activate all of the spikes at
once in the Spider Tomb spike field.
Breadwinner (25 points): Earn the top score objective in any level.
Seeing Red (20 points): Collect all 10 red skulls in any single
level.
Overachiever (15 points): Complete any level-specific Reward
Challenge.
Tomb Raider(25 points): Collect all relics, artifacts and
weapons.