During the Deliver stage of the Double Diamond model, the process revolves around the final concept, final testing, production and launch. The product or service developed to solve a specific problem during the Discovery stage has reached completion.
Important activities at this stage are: final testing, approval, launch and evaluation.
Look at this page for methods - look under the specific phase.
During this phase, in the first year of the project for example England and Denmark exchanged the padlets with the exergames and tried to reconstruct the games and gave our opinion on how the games worked for us.