Jonatan Söderström (born 9 October 1985), also known as Cactus, is a Swedish video game developer.

He is best known as the co-designer and programmer of Hotline Miami (2012) and Hotline Miami 2: Wrong Number (2015), but had prior to those games developed over 40 small freeware games, many of which were positively received.

[3] In 2010, he won the IGF's Nuovo Award, which honours unconventional game development, for his puzzler Tuning.

[6] When asked about his game design style in an interview, Söderström replied "Variation can be good, but so can consistency.

When I make games I try to keep them unified and to the point, so I don't drift off too far.