Gaming is a tough niche... actually it isn't a niche so much as a genre. But like any other genre it follows the same viewer protocol as anything else. Viewers are searching for content and YouTube is going to suggest to them content based on their viewing habits. All you need to do is get your content in front of the correct viewer and then get them to click and watch.
And this is exactly where TubeBuddy can help. The Keyword Explorer will help you to uncover underserved keywords to get in front of viewers that are interested in your type of content and the games that you play. Tools like the Thumbnail Generator, Click-Magnet and A/B Testing (for Legend license users) will help you to get more of those viewers to click on your video and the in-depth analysis tools offered in your account can give you insight into the things in your video that are attracting or deterring your viewers from watching so that you can improve your overall watch time and therefore overall performance of your videos.
TubeBuddy is a tool that you will have to learn, and it isn't easy. YouTube in general is often referred to as a marathon and not a race. But we can help if you choose to do so.