In the second part of Abandoned 2, an unnamed hero continues to search for his twin brother in an abandoned forest town. The game has many hidden places, there are several interesting and rather original puzzles. Tasks are not particularly difficult, but it’s a little difficult to navigate, since there is no map and to remember where you need to go you need to wander around the game a little. To complete the game you need to feed seven keys to the unit, which will give you a special pass. All four hidden signs are found in this video. Game taken from cool math games.