The Fall of Cybertron demo will be available to download on July 31 for Xbox 360 and PS3 users, reports IGN.
It will contain single and multiplayer missions, and demonstrate the character customisation options.
However, the demo will not be available to download on the PC, despite the game releasing on the same day as console versions.
Transformers: Fall of Cybertron is the follow-up to 2010's successful Transformers: War for Cybertron, which is developed by High Moon Studios and published by Activision.
The game will take players through the end of the Transformers' civil war, leading to their exodus to Earth. It will include a new playable character in the form of fan-favourite Grimlock.
Activision recently revealed a number of pre-order incentives, including GAME's G1 Retro Pack, which enables users to select the G1 Optimus Prime from the '80s animated show in single and multiplayer.
Originally due to launch on August 28 in the US, the game will now launch one week earlier on August 21. The UK's August 24 release date remains unchanged.
Watch the retro Optimus Prime pre-order trailer below: