Steam has kicked off a free weekend event for a pair of quality games that you can check out (and then buy for cheap) this weekend.

Tropico 5 can be downloaded and played as much as you want for free from now until this Sunday, March 22, at 1 PM Pacific. If you want to keep playing beyond then, the full version is 75 percent off until Monday at 10 AM, dropping its price to just $10. Alternatively, if you know anyone else who might be interested in a copy, you can pick up the two-pack for $17.49 or the four-pack for $30.

Killing Floor is also free to from now until Sunday at 1 PM. And, just like Tropico, you can pick up the full thing for 75 percent off ($5). The six-pack also carries the discount, bringing its price down to $24.98, and all of the game's DLC is also on sale, ranging in price from $1.24 to $1.99.

Tropico 5 is the latest game in the city-building franchise, while Killing Floor has a sequel coming out later this year.