Free to Play Crossout

Highly recommended by two separate co-workers

Join CROSSOUT, the post-apocalyptic MMO Action game! Craft your unique battle machines from a myriad of interchangeable parts, ride them directly into combat and destroy your enemies in explosive online battles!

Key Features:

• Unique vehicles, crafted by players using a wide range of available parts: from nimble buggies to heavily tracked off-road vehicles and even combat walkers.
• Complete freedom of creativity and thousands of possible combinations: Create vehicles of any shape using a wide range of parts, with a wide variety of armour and weapons to help support your arsenal.
• Advanced damage model: destroy any part of an enemy vehicle and it will affect the machine's performance immediately.
• A huge arsenal of weapons: From chainsaws to power-drills, machine guns to rocket launchers, and a wide range of variety including flying drones and stealth generators.
• Your own workshop: create new and advanced parts, and auction them at the in-game marketplace.
• Trading options between players: every piece that you have gathered in battle can be sold to other players.
• Choose your own battle strategy: Apart from victory, the only thing that matters is your Survival!

As I am constantly reminded (all day) from the desk beside me, it's free.

More info at the Official Crossout Website