Limbo

Wrong Way
Reward: 5 Points
Objective: That's not right

Altitude is attitude
Reward: 5 Points
Objective: Exploration off the ground

It's Stuck
Reward: 10 Points
Objective: Prepare a dry landing

Urban Exploration
Reward: 10 Points
Objective: Involves heavy lifting

Alone in the Dark
Reward: 10 Points
Objective: Beneath the arthropod

Climbing the Cog
Reward: 10 Points
Objective: Don't pull the lever just because you can

Backtracking
Reward: 10 Points
Objective: Ride the crates

Guided by Sparks
Reward: 10 Points
Objective: The crate is key

Under Ground
Reward: 10 Points
Objective: Vertical passageway

Going Up
Reward: 10 Points
Objective: Don't let gravity keep you down

Where Credit is due
Reward: 100 Points
Objective: Persistence has its own reward

No Point in Dying
Reward: 10 Points
Objective: Complete the game in one sitting with five or less deaths