High Grade Universal Century (HGUC) (ハイグレード ユニバーサルセンチュリー) is a line of 1/144 scale Gunpla kits of the Mobile Suits from the Universal Century timeline in the Gundam meta series. First produced in 1999, the line supplanted normal HG kits such as the HG RX-78-2 Gundam. The kits are known for their ease of construction and generous use of polycaps and tinted plastic for details such as visual sensors, monoeyes and Beam Saber effect parts.
Starting in 2010. the HGUC line extended to the After Colony, After War, Future Century, Cosmic Era and Correct Century timelines with the HGAC, HGAW, HGFC, HGCE, and HGCC lines, respectively, as part of the "HG All Gundam" project. Whereas the HGUC box packaging uses a gold stripe on the side panels, the alternate timeline kits are distinguished by the silver stripe on their boxes.
In June 2015, Bandai initiated the "Revive" project to celebrate the 35th anniversary of Gunpla. Starting with the RX-77-2 Guncannon, previous HG releases are given a complete redesign using newer technology for improved detail, articulation, and proportions.