The 3 you're missing are waiting in the store after killing clerk, walking away from the gas station, and talking to the clerk without buying anything (called the poor ending by the speedrunning community)
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I absolutely wish it was as easy as clicking a button. But game development is not the easiest thing to get into. It took me almost 2 years of failed prototypes and losing motivation between the release of my first game, None Left, and this one.
But if you do end up getting into game development, I don't want what I just said to discourage you. Each failed prototype is a new concept learned. Each time you lose motivation is another opportunity to start another project you will be proud of.
...Sorry that got kind of philosophical. But I make my games using the Godot game engine. It's free and open source, and relatively easy to learn