This month's free PS Plus games are now available, but those aren't the only freebies Plus subscribers can get right now. Those who claimed the 2D shoot-'em-up Mercenary Kings when it was free on PS Plus can now upgrade to the game's Reloaded Edition for no cost.

Mercenary Kings originally launched for PlayStation 4 back in 2014 and was part of the PlayStation Plus Instant Game Collection, allowing PS Plus subscribers to download the title for free immediately on its release. The Reloaded Edition arrived earlier this month and introduced two additional characters, new guns and knives to craft, and an assortment of gameplay improvements.

If you downloaded Mercenary Kings when it was first available on PS Plus, you can snag the free upgrade here. The Reloaded Edition also supports Cross-Buy and comes with a version for Vita. You can learn more about the Metal Slug-inspired shooter in our original Mercenary Kings review.

February's batch of free PS Plus games rolled out earlier this week and is headlined by Knack and Rime for PS4. In addition to those, PS Plus members can now get the 2D platformer Spelunker HD, the turn-based RPG Mugen Souls Z, and the tactical RPG Grand Kingdom. One of January's PS Plus titles, the PSVR shooter Starblood Arena, is also still available to claim until March 6.