The Chimedon assault vehicle is the most heavily armed version of the Chimera, destroying enemy vehicles that stand in the way of Imperial advances. It is fielded by the Astra Militarum and Skitarii. It mounts a large battle cannon.
Chimedons have a strengthened turret, allowing it to mount a short-barrelled battle cannon, similar to the cannon carried by the Stormhammer. The shells fired by the Chimedon are armour-piercing, and can damage enemy tanks and even Titans at medium range.
The Chimedon maintains the full transport capacity, manoeuvrability and sturdiness granted by its Chimera hull, giving it superb tactical flexibility. However, it always lacks defensive bolters, making the Chimedon vulnerable to infantry assaults. Due to this, Chimedons are not often used to spearhead assaults.
The Chimedon can be used to replace Chimeras on a one-for-one basis in Imperial forces. Chimedons can also be organised into Chimedon Assault Squadrons, which are then attached to various infantry detachments.