Ground Branch

This hardcore tactical shooter offers a simple yet satisfying first person shooter experience. Developed by one of the ORIGINAL Rainbow Six and Ghost Recon devs, this game aims to be one of the most realistic experiences on the market. Smooth gunplay, realistic mechanics, and a lot of fun. Whether it's single player, pvp, or pvE, this game is certainly an asset in the tactical shooter toolbox.  It's currently early access, so expect some bugs and such, but mod support is coming in the next update AND each update makes the game better and better. Recommended for solo gamers and tactical LARPers

Steam Description:

From one of the developers behind the original Rainbow Six® and Ghost Recon® games, comes a thinking-man's first-person shooter featuring in-depth character and weapon customization. Take your time. Think ahead. Get the job done.