Dawn of War 2 will give you 5 points for using the army painter ("The Red Ones Go Faster").
Two Worlds had all sorts of weird ones, you'd get achievements for taking all kinds of mundane actions, such as leveling up once, enhancing or enchanting items, using alchemy to produce anything, learning a new skill, ect. What's really wacky was, these were all 5 and 10 point achievements, but beating the game would net you 380 or so in one go.
Quantum of Solace has some weird extra challenge achievements, such as completing most of a level without breaking stealth, or killing everyone in an area with one shot ("I miss the cold war"). Out of context, most of the Quantum of Solace achievements had wacky names, such as "Moonraker", or "Half Monk, Half Hitman".