What are the extres in sift heads 3?

In "Sift Heads 3," players can engage in various extras that include unlockable weapons, special missions, and character upgrades. The game features a story mode that expands on the narrative and allows players to explore different environments. Additionally, there are challenges and side quests that enhance gameplay and provide opportunities for players to earn rewards. Overall, these extras contribute to a richer gaming experience and encourage replayability.