Unfortunately, War2Sim isn't available for downloading because the developers hosted their installation package on a file hoster, and they didn't purchase a premium subscription to store the file for a longer period. Because of that, the installation package has been deleted after 100 days since upload. Contacting the developers is not possible since they don't offer anything on their website, but some links can be found that lead to Play Store.
Use the following email (listed on the Play Store): w2v_android@wistone.net