Every level is a maze made up of square tiles, and you can only step on the transparent ones. You move a white circle with the [arrow] keys, and your job is to collect all the transparent circles without stepping on the same tile twice.
Pathologic is one of many Brain Games to play online on your web browser for free at KBH Games. Tagged as Brain Games, Hard Games, Logic Games, and Puzzle Games. Upvoted by 5 players. Other games you might like are Zoi the Escape and City Car Stunt 3. No download or installation needed to play this free game. Hope this game brings a little joy into your daily life.