Delta T is described as 'Augmented Reality Location based MMO with in depth clan gameplay. Players can strategize with friends, battle it out with rival players, and find artifacts from the future hidden in the real world. Sign up now for the beta'. There are four alternatives to Delta T for a variety of platforms, including Android, Android Tablet, iPad, iPhone and Online / Web-based. The best alternative is Ingress, which is free. Other great apps like Delta T are Pokémon GO (Freemium), Clash & GO (Freemium) and Paraversume (Free).