As a new version of Didnapper 2 has released, the current most-recent version of Overkill (v0.14.4) is incompatible with the latest version of Didnapper 2 (1.2.5). We are currently working on creating a new patch which will be compatible with 1.2.5 and will introduce some new content. It will be released as soon as it is completed. Until then, if you wish to install Overkill v0.14.4, you will need to use version 1.2.4 of Didnapper 2. 

Thank you for your patience, we will try to release an update as soon as we can get all the new changes sorted out.