6. Undertale
Developer: tobyfox | Release Date: September 15, 2015 | Rating on Steam: 96 % Positive (303,000 reviews) | Price: €9.99
What kind of game is this? As a child, you fall into the world of monsters and must find a way out of this situation. In Undertale, you get the chance to meet absurd and crazy monsters that have been banished from the surface. It is up to you whether you want to defeat them or befriend them instead.
Through various play styles, there are multiple ways to experience the ending of Undertale. For example, you will see a different ending if you choose the path of the pacifist and spare every monster. Or you make the exact opposite choice and kill every creature that stands in your way.
Who is the developer? The solo developer Toby Fox programmed the game, designed the characters, and composed the music for Undertale himself. After nearly 3 years, his project was released in September 2015 and quickly became a hit on Steam.