Argo vs Horizon Source
Argo
Argo is hardcore tactical MMOFPS that is, according its developers, a free total conversion of the popular Arma game franchise, specifically Arma 3. Although the franchise itself as not reached mainstream popularity like Counter-Strike, Battlefield, and Call of Duty, it has a niche and dedicated fanbase that you'll probably see a lot of while playing this game.Featuring a three competitive game modes and one 10-vs-AI cooperative mode, the game is set in the Mediterranean island of Malden that houses a range of combat zones perfectly designed to fit each mode. The game even has a built-in 3D scenario editor that allows you to create your own missions and other content for Argo players to enjoy!
If you love military-themed shooters, Argo is a pretty solid game to play. After all, you'll get to experience a bit of the famous "Arma gameplay" for free.
Horizon Source
Horizon Source is a battle royale game that many have dubbed as being the ultimate blend of PUBG, Fortnite and Overwatch... though graphics-wise, Fortnite is definitely the major influence. Similar to most games in the genre, you'll be dropped into a map where you'll then battle against other players in hopes of ending up being the last man standing. You can also build structures much like in Fortnite and resources are pretty much plentiful in the game. The gameplay feels a lot better as well - expect to be rewarded with more kills for having a good aim.However, unlike the others, this game only has a 4-man team-based game mode so you can't really play the game solo as of yet. There are other game modes as well, including a zombie mode, but these aren't ready so far. Interestingly, the game also gives you the option of playing in first or third person view. Naturally, playing in third-person can be more advantageous to you since you can see your surroundings better. There are no drivable vehicles in this game though.
Despite the many random bugs, lack of an EU server, some character balancing issue, and broken English, Horizon Source seems to be a real contender on PC against established battle royale titles like PUBG and Fortnite. The game can be incredibly addictive and fun to play. So, if you enjoy playing battle royale games, Horizon Source is a game you'll want to try!