I’ve always had a strong (though not exclusive) achiever streak in computer games (by both Jon Radoff and Richard Bartle‘s classifications). Course many early games were all about racking up the points in a bid to ascend to the glory of the High Score Table (and the resulting dilemma of whether to enter your actual initials to proclaim your great skill to the world, or a hilarious three-letter profanity. BUM, tee hee!) and you didn’t have much of a choice over being a completionist. You had to shoot all the titular Space Invaders, gobble all the pills in Pac-Man and knock out every brick to get Thro’ The Wall to progress to the next level (of more Invaders, pills or bricks).