Glacier Engine 1 (Concept) - Giant Bomb

The Glacier 1 engine was created in 1998 by IO Interactive, and have been running most of all IO Interactive's games since. The Glacier 1 engine is by 2011 retired through the announcement and upcoming release of the newer and stronger Glacier 2 engine, in the latest franchise Hitman: Absolution.

Best of Giant Bomb 180 - Technical Analysis

Monumental Damage - TV Tropes

Deliberately Retro Games - Giant Bomb

Glacier Engine 1 (Concept) - Giant Bomb

Bob-omb - Super Mario Wiki, the Mario encyclopedia

Glacier Engine 1 Games - Giant Bomb

Reviews: Hitman: Absolution - IMDb

SQUARE ENIX The Official SQUARE ENIX Website - Tagged

Big Boo - Super Mario Wiki, the Mario encyclopedia

Super Mario Bros. 2 (Video Game) - TV Tropes

Science, art and creative storytelling collide in sci-fi video game design

9 Hidden Wonders in Eastern Colorado: Roam with dinosaurs, scale the minarets of an actual castle, witness rare birds, and revel at starry skies. - Atlas Obscura

Hitman (Game) - Giant Bomb