Star Trek: 25th Anniversary is a 1992 adventure video game developed by Interplay and published by Ultra Games for the Nintendo Entertainment System.

The game begins as the USS Enterprise is approaching the planet Sigma Iotia II. The ship is caught up in a tear in space-time that sends them to an unknown area of space. While attempting to escape the tear, the dilithium crystals that are needed to travel at warp speed have been fused and are useless. The Enterprise crew finds that it is trapped in a decaying orbit above an unknown planet. Spock detects small amounts of dilithium crystals on the planet. Kirk leads an away team to secure the crystals and keep the Enterprise from burning up as the orbit decays. After navigating a deadly bog, braving the bloodworms, and figuring out the riddle at the obelisk, Kirk and his away team find some low-grade dilithium that will get the Enterprise part of the way back. The Enterprise crew is forced to make several more stop-offs for dilithium before getting back to Sigma Iotia II to figure out what caused the tear in space-time, and find a way to fix it.