While it's challenging to definitively state which gaming ad networks always offer the highest ROI, as it heavily depends on your specific game, target audience, ad creatives, and campaign optimization, some networks are consistently cited for their strong performance and features that can lead to high ROI:

Top Contenders Often Mentioned for Strong ROI:
There's no single "best" gaming ad network for the highest ROI. The ideal choice depends on your specific circumstances. It's often recommended to test multiple networks and continuously analyze their performance to identify the ones that deliver the best results for your game. Look for case studies and testimonials relevant to games similar to yours to get a better understanding of potential ROI.

Top Contenders Often Mentioned for Strong ROI:
- 7Search PPC:A long-standing platform focused on mobile game monetization and user acquisition. They offer a high revenue share and tools for direct deal management and cross-promotion. Their real-time bidding system aims to maximize revenue for publishers.
- Unity Ads: Particularly strong for games built with the Unity engine due to seamless integration and high-quality rewarded video ads. Their focus on enhancing the gaming experience while generating revenue can lead to better user engagement and retention from ad interactions.
- AppLovin: Known for its sophisticated machine learning algorithms that help deliver targeted and personalized ads to users most likely to engage. They offer a wide range of ad formats and focus on maximizing ARPDAU (Average Revenue Per Daily Active User).
- AdMob (Google): Offers a vast global reach and a wide variety of customizable ad formats. Its integration with the Google Ads ecosystem provides powerful analytics and bidding tools. AdMob's focus on tailoring ads to users who are less likely to make in-app purchases can be effective.
- ironSource: A comprehensive monetization platform with a strong emphasis on user experience and quality conversions. They offer various ad formats, including offerwalls, and focus on long-term user growth through positive ROI campaigns.
- Liftoff (formerly Vungle): Specializes in mobile app marketing and retargeting, focusing on acquiring and engaging high-quality users. They are known for high eCPMs and video completion rates.
There's no single "best" gaming ad network for the highest ROI. The ideal choice depends on your specific circumstances. It's often recommended to test multiple networks and continuously analyze their performance to identify the ones that deliver the best results for your game. Look for case studies and testimonials relevant to games similar to yours to get a better understanding of potential ROI.