So the below mentioned games are some free FPS/SHOOTING games can be run in even a low end pc and i will be mentioning according to it.
1-VALORANT
VALORANT is your global competitive stage. It’s a 5v5 tac-shooter matchup to plant or defuse the Spike in a one-life-per-round, first to 13 series. More than guns and bullets, you’ll choose an Agent armed with adaptive, swift, and lethal abilities that create opportunities to let your gunplay shine.Creativity is your greatest weapon.
PC HARDWARE REQUIREMENTS
MINIMUM SPECS / 30 FPS. CPU //Intel Core 2 Duo E8400. GPU //Intel HD 4000.
RECOMMENDED SPECS / 60 FPS. CPU //Intel i3-4150. GPU //Geforce GT 730.
HIGH-END SPECS / 144+ FPS. CPU //Intel Core i5-4460 3.2GHZ. GPU //GTX 1050 Ti.
2-CS GO
Counter-Strike: Global Offensive (CS: GO) expands upon the team-based action gameplay that it pioneered when it was launched 19 years ago. CS: GO features new maps, characters, weapons, and game modes, and delivers updated versions of the classic CS content (de_dust2, etc.).
system requirements minimum
RAM – 2 GB
Graphics Card - Video card should be at least 256 MB. The AMD Radeon HD 6450 is recommended.
Minimum Hard Drive Space – 8 GB
DirectX – Version 9
Processor – Intel Core 2 Duo Processor E6600 (2.40 GHz, 1066 MHz FSB, 4M Cache)
Operating system - Windows XP 32 bit. The game can also run on Windows Vista and Windows 7
recommended
CPU: Intel Pentium Dual-Core E5700 3GHz / AMD Phenom 8750 Triple-Core
RAM: 2 GB
HDD: 15 GB of storage space
GPU: NVIDIA GeForce GT 630 / AMD Radeon HD 6670
OS: Windows 7
DirectX: Version 9.0c
Screen Resolution: 1080p
Network: Broadband Internet Connection.
3-PALADINS
free-to-play fantasy team-based shooter sensation. Wield guns and magic as a legendary Champion of the Realm, customizing your core set of abilities to play exactly how you want to play.
System Requirements minimum
OS: Windows 7 64-bit or newer.
Processor: Core 2 Duo 2.4 GHz or Athlon X2 2.7 GHz.
Memory: 4 GB RAM.
Graphics: Nvidia GeForce 8800 GT.
Storage: 30 GB available space.
Sound Card: DirectX compatible sound card.
recommended
OS: Windows 8/10 64-bit (latest Service Pack).
Processor: Intel Core i5-750, 2.67 GHz / AMD Phenom II X4 965, 3.4 GHz.
Memory: 6 GB RAM.
Graphics: Nvidia GeForce GTX 660 or ATI Radeon HD 7950.
Network: Broadband Internet connection.
Storage: 30 GB available space.
Sound Card: DirectX compatible sound card.
4-BLACKSQUAD
Black Squad is a free-to-play military first-person-shooter. Players can master their skills and show off their strategies with a wide range of game maps, modes, and weapons to choose from.
System Requirements minimum
OS: Windows 7 64bit.
Processor: CORE2 DUO 2.2GHZ / AMD Athlon 64 X2 2.66GHz.
Memory: 4 GB RAM.
Graphics: NVIDIA GEFORCE 8600 OR GT630 / RADEON HD 6750.
DirectX: Version 9.0.
Network: Broadband Internet connection.
Storage: 7 GB available space.
recommended
CPU: CORE2 DUO 2.4CHZ / AMD Phenom X4 820
CPU SPEED: Info
RAM: 4 GB
OS: Windows 7 64bit
VIDEO CARD: Nvidia GTX 560 / Radeon HD 7790
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
FREE DISK SPACE: 5 GB
DEDICATED VIDEO RAM: 1024 MB
5.TEAM FORTRESS 2
Team Fortress 2 is a multiplayer first-person shooter video game developed and published by Valve. It is the sequel to the 1996 Team Fortress mod for Quake and its 1999 remake, Team Fortress Classic.
System Requirements minimum
Operating System: Windows 7 (32/64-bit)/Vista/XP.
CPU: Intel Pentium 4 1.70GHz.
RAM: 512 MB RAM.
Hard disk: 15 GB available space.
Video card: AMD Radeon X1600.
RECOMMENDED
OS: Windows® 7 (32/64-bit).
Processor: Pentium 4 processor (3.0GHz, or better).
Memory: 1 GB RAM.
DirectX: Version 9.0c.
Network: Broadband Internet connection.
Storage: 15 GB available space.