Adrenaline Vault
[3.5/5] Review by Bob Mandel. "...[P]rovides not only a sense of freedom but also a sense of chaos, and I recommend it highly..." Includes screen shots.
Codemasters: 1nsane
Official site. Includes downloads, game information, forum, technical support, and screen shots. [Flash required]
GamePro.com: 1nsane
Reviewed by: Human Tornado. "Overall, Insane is a decent deal for thirty bucks." Also includes screen shots.
GamersHell.com
[8.666/10] "A Definite winner, Online gaming is a huge success on this one..." Also includes screenshots.
GameSpot
[7.6/10] Reviewed by: Giancarlo Varanini. "Overall, though it has a few problems and takes some getting used to, 1nsane can be a very enjoyable off-road racing experience." Also includes a preview, downloads, and hints.
GameZone.com: 1nsane
[8/10] Reviewed by Rita Courtney. "The only real problem I saw with the game is the load time." Also includes screen shots.
IGN.com: 1nsane
[7.1/10] Reviewed by Anthony Chau. "And while 1nsane might be fun when you initially fire it up, this game is anything but "1nsane." Also includes screen shots.
Insane Garage
Contains utilities, vehicles, and a tutorial on making cars for download.