Dead Space 3: In the beginning of the game at the first Suit Kiosk (DLC Suit Comes With Dead Space 3 Limited Edition)
The suit is a basic reskin of the Arctic Survival Suit but features Unitology symbols and a blue and black color scheme with blue visor for Isaac and a red and black color pattern with red visor for Carver.
The suit is said to be worn by a group known as the Sovereign Colonies Armed Forces (S.C.A.F.) and in particular, a dig team down on Tau Volantis. Highly insulated to protect them from the harsh environment of the planet, their suits are said to have been branded "head to toe" in strange symbols, a physical reminder of what they discovered below the icy surface of the planet. They are an evolution of the standard snow suit (or actually they used to be snow suits before the workers wrote strange symbols on it)