Hello,
Below are the Events, Quests and World tasks which doesn't require participation for rewards. All listed below rewards are available when your World succeeds.
A Piece of Cake - 25% more health and mana regeneration for seven days and a experience bonus of 50% for premium players for seven days. Even if you don't take part in the event, you still can take individual rewards such as:
One of the three cake items:
Cake Cabinet Kit
Cake Backpack
Cake Tapestry
And one of the three cupcakes:
Blueberry Cupcake
Strawberry Cupcake
Lemon Cupcake
A Pirate's Death To Me - You don't need to take part in the tasks to receive the rewards. If your World succeeds in 50 journeys, it will receive a 10% exp increase to undead creatures.
Annual Autumn Vintage - Health and Mana Potion's effect will be enhanced by 33% for 7 days.
Bewitched - 50% experience bonus for 10 days if your World succeeds.
Demon's Lullaby - Experience bonus of 50% until May 21st.
Spring Into Life - Dragon hatchlings yelds 25% more experience.
The Colours of Magic - One week of benefits depending on the winning wizard.
The Lightbearer - 10% more experience in shared experience party mode (until November 30th)
Orcsoberfest - During the weekend after the event, all game worlds will receive a 50% XP boost for creatures of a certain the bestiary class, which may vary between editions.
Rise of Devovorga - Worlds who succeed on killing Devovorga will receive 50% extra regeneration per hour until the end of September.
Winterlight Solstice - Once the Winterlight Solstice ends, all worlds receive a week of increased respawn rates (2x) while mana & health points regenerate twice as fast. Since it's not really possible to "fail" in this event, all game worlds receive this reward.
Sources: https://tibia.fandom.com/