The free-to-play games.
Chronotron is a Flash game developed by Scarybug Games and published on Kongregate (www.kongregate.com/games/scarybug/chronotron) in 2008. The protagonist is a robot who needs to solve puzzles that requires sending himself back in time to coordinate with his previous actions. There are 5 bonus levels that are only available if you play the version hosted in Kongregate. Nevertheless, to make sure everyone could play all the levels, even outside Kongregate, i edited the game file with JPEXS and re