Although free shooter from Epic Games is still in pre-alpha phase, but you can enjoy several of its maps in its final version and with all weapons.
Unreal Tournament adds new map ‘Underland’ – Screenshots and Trailer
Starting today, for fans of classic shooter the game is now developed on Unreal Engine 4. Underland is a Deathmatch level designed for 6 to 8 people. Players fight across a hidden outpost, once lost for a thousand years, that guards the entrance to the massive Underland caverns.
If you’d rather just mow down your enemies, you can download the new map here. It’s free, of course. The game is currently in a “pre-alpha” state with full release planned for sometime in 2017 and it’s a free download, not free-to-play, but free.