Seiklus is a platform game that focuses on exploration.
The game features no dialogue, enemies, or clear objectives.
It is up to the player to explore the world and interpret its meaning on their own.
Unlike many other platformers, Seiklus lacks common video game elements such as combat or puzzles.
Instead, it focuses entirely on freeform exploration, allowing players to navigate environments
filled with symbols and familiar imagery that evoke emotions, memories, and personal interpretations.

Seiklus inspired many later exploration-based platformers and adventure games. Titles influenced by it include Within a Deep Forest, Knytt (2006), and An Untitled Story.

A game inspired by Seiklus, created by Madeline Thorson, the developer of Celeste.