The Sigma adventure game for single players will certainly give you something to think about as you explore the strange environments that you find yourself in.
You begin your adventure by first visiting an Easter Island statue and the first clue you need in order to proceed you can find on the message board to your right. Your journey will take you through a blue corridor, hexagonal doors, a round gray room where you will discover a pyramid of puzzles and other clues and information. Solving the puzzles opens doors for you in the emergency power unit, enables you to pull levers and press switches, and finally leads you back to where you began to find a message that will answer your questions. One good tip for you, keep a pen and paper at hanf for this challenging game.
Pros
- Free of charge
Cons
- High use of system resources