Add pull request template

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -0,0 +1,39 @@
+# Merge request
+
+## Related issues
+
+<!---
+Consider creating an issue first, before creating a pull request.
+The issue might need some discussion first, before implementing an appropriate solution.
+Link any issues related to the PR here.
+-->
+
+## Description
+
+<!--
+Provide a high level description/summary of your changes.
+-->
+
+## How were these changes tested?
+
+<!---
+Please describe in detail how you tested your changes.
+Include details of your testing environment, and the tests you ran to
+see how your change affects other areas of the code, etc.
+-->
+
+## Checklist
+
+<!--
+Checklist to support you in completing required tasks before your changes can be merged.
+Note that not always every step is required. You might have to add custom items specific
+to your task or remove items that are not relevant.
+-->
+
+* [ ] Implemented (unit) test(s) which prove that the introduced changes are working as expected
+* Tested with the following games:
+  * [ ] ... <!-- insert game name 1-->
+  * [ ] ... <!-- insert game name 2--->
+* [ ] Followed the developer (style) guidelines
+* [ ] Updated existing doc of or add new doc to README file(s)
+* [ ] Updated development documentation