If you've never given the Metro games a try, then now may be the time as the very first game in the series is currently free to play on Steam and is available until 15 March.

It's worth noting that is the original version that released in 2010, not the updated and remastered Redux version that appeared in 2014, but that's also available with a hefty discount (80% off).

Though not the latest game in the Metro series, it's still a fantastic game with loads of fun to be had. The game is loosely based on Dmitry Glukhovsky's novel of the same name, set in a post-apocalyptic world with mutant beasts, psychological experiences and harsh environments to survive. 

We thoroughly enjoyed Metro 2033 when we first played it and if you don't mind the slightly dated visuals then you'll have a thoroughly entertaining time playing this one. 

Metro 2033 is an enthralling game and a wonderfully atmospheric experience. Once you've played it you're bound to want to play the others as well and they're all on sale as well, so make sure you get stuck in.