Theseis

Theseis was presented in third-person perspective, with the camera trailing behind the character. Players would take control of one of two playable characters, named Andronicos and Phoebe. Character movement in the game would include real time activities such as running, jumping, and climbing, allowing for complex interactions with the environment, while elements of stealth gameplay would also be incorporated. The game would feature no gunplay and subsequently, the player would not be able to kill enemies. The main focus of the gameplay would rather be on the player having to solve a variety of puzzles, requiring the player to combine objects, abilities and items of their inventory in order to make progress.

Both characters were planned to acquire a special ability as the game progressed. Andronicos' True Sight would give players the ability to see and interact with items from the ancient world. Phoebe's ability would allow the player to automatically decipher ancient symbols, hieroglyphics and mechanisms pivotal to the solving of environmental puzzles.

Andronicos Kalogirou, a paranormal investigator with a small office in the historic center of Athens, is a man devoted to science, waging an ongoing war against superstition. He diligently works to uncover the truth behind paranormal phenomena, determined to prove that anything supernatural has a logical explanation, and can be attributed to drunken fantasies and uneducated hysteria. On the other hand, Phoebe, Andronicos' adopted sister, is a fervent believer of the supernatural.

Upon learning that their father Costas has gone missing, and is presumed dead, the duo embarks on a quest to uncover an ancient conspiracy kept hidden throughout the ages through stealth and murder. Throughout their journey, they uncover a hidden network of caves beneath Athens, crawling with remnants and treasures of a long lost era. Their travels will take them to other locations of myth and legend, like Crete and Delphi, and encounter a number of colorful characters, from other explorers to beggars to actual mythological creatures and characters. They soon find themselves tracking down a long lost artifact, a source of immense power lay dormant, with the potential to either ascend, or doom the entire human race.

Theseis began development in 2004, and was originally intended to be a point and click adventure game, with strong similarities to Syberia. After the assembly of a small team and with funding provided by Track7 Games Founder and CEO Kyriakos Raptopoulos, eight months of the development effort were put into a promotional cinematic that was unveiled at E3 2005. Along with Darkfall, Theseis was considered a strong prospect for the Greek video gaming industry, due to its high production values and ambitious scope similar to that of big-budget productions. The game was planned for release for PC and next-generation consoles, and while the PC and Xbox 360 versions of the game were confirmed, a PlayStation 3 version was eventually dropped.

Following the game's reveal, and fueled by the positive feedback from E3, Track7 made radical changes to the original design, departing from the original point ‘n click format and turn Theseis into an action-adventure game more similar to Tomb Raider: Legend. The decision was made to unveil the new direction the game was taking at E3 2006, this time with a playable demo. The game had a successful showing, featuring top notch graphics and responsive platforming controls, eliciting positive reaction from the press and attracting several top publishers.