O.D.T. - Escape...Or Die Trying, is a video game created by Psygnosis for the PlayStation and Microsoft Windows. It is a 3D action-adventure, with some role-playing elements. Playing as 1 of 4 characters, your goal is to explore the "Forbidden Zone" to look for gas canisters to re-inflate your balloon, which had crashed on the roof of a mysterious tower. Along the way you solve puzzles, battle monsters, and so on. An N64 version was completed but never released, though it has recently been leaked online.
Source: Wikipedia, "O.D.T.," available under the CC-BY-SA License.