Na Katamari Damacy, We Love Katamari, Me & My Katamari en Beautiful Katamari ontwikkelt Namco Bandai nu Katamari Forever dat exclusief op de PlayStation 3 verschijnt. Katamari Forever voegt onder andere nieuwe items, meerdere stijlen en een sprongbeweging toe aan de traditionele Katamari gameplay.

Een andere toevoeging zijn de Trophies, welke tegenwoordig verplicht zijn voor elke PS3 game. De game bevat 33 verschillende Trophies, namelijk één platinum, zes gouden, zes zilveren en twintig bronzen Trophies.

Platinum Katamari (Platinum)
Collect all of the trophies

Congratulations (Gold)
You've cleared all the stages with "New Katamari".

Falcon (Gold)
You've cleared all stages with "Katamari Drive".

Back Then (Gold)
You've cleared all the stages with "Back Then Katamari".

Walking Dictionary (Gold)
You've got 100% in the Superb Collection.

Cousin Mania (Gold)
You've collected all of the Cousins.

Collector (Gold)
You've collected all of the Presents.

Forever a Traveller (Silver)
Beat all of Eternal.

Big, Big, Big Katamari (Silver)
Create a Katamari which is over 2,000,000km.

Destroyer (Silver)
Throw at least 50 Katamaris away.

Creator (Silver)
Make over 200 Katamaris.

Punishment Master (Silver)
Obtain over 50,000 points in the Punishment Minigame.

Left the Atmosphere (Silver)
Obtain over 50,000 points during the Ending Minigame.

Big, Big Katamari (Bronze)
Create a Katamari which is over 10,000km.

Big Katamari (Bronze)
Create a Katamari which is over 500m.

First Star Of Rubbish (Bronze)
You have thrown away your first Katamari Star.

First Katamari (Bronze)
You have completed the first stage.

Superb Collector (Bronze)
Obtain over 80% of the Superb Collection.

Thinking Of Cousins (Bronze)
Collect over 30 of the Cousins.

Fashionable (Bronze)
Collect over 30 varities of Presents.

Film Fan (Bronze)
Watch at least 5 films in Film Mode, without skipping.

Lonely (Bronze)
Complete 50 stages in a row in any mode apart from Coop or Battle.

Good Friends (Bronze)
Play over 30 stages in Coop or Battle mode.

H-h-h-h-h-h-hopping (Bronze)
Complete a stage using "Oji Hop" only 7 times.

D-d-d-d-d--dash (Bronze)
Complete a stage using "Oji Dash" only 6 times.

T-t-t-t-turn (Bronze)
Complete a stage using "Oji Turn" only 5 times.

Master Of Ruining (Bronze)
During one stage, clear the stage while breaking your Katamari over 50 times.

Love Rolling (Bronze)
During one stage, Roll over more than 7650 "things".

Mini Gamer (Bronze)
Play all of the Mini Games.

Superb Listener (Bronze)
Play at least 5 songs in the Sound Mode.

Photographer (Bronze)
In the Photograph Hall, Check a photo you have taken.

Love Ranking (Bronze)
Check the Net Ranking over 5 times.

Punishment Regular Customer (Bronze)
Receive "Punishment" more than 50 times.