Aim Hero is a shooting accuracy training software for first person shooting games, developed by ProGames Studio in 2016. It can help players train shooting ability effectively. It provides a variety of training modes, each mode has several difficulty levels, and gets you detailed statistics at the end of training for analysis. Finally, Aim Hero enables you to shoot the enemy more rapidly and accurately in a variety of FPS games.

8-Bit Commando is a small 2D indie game developed by 2D Engine and first released in 2011. The first time you see it, you will realize that this is a remake edition of the old but classic series of video game Contra. In other words, that is equivalent to port Contra from FC console to PC platform to let you relive this classic video game.

Radial+ (AKA: Radial Plus) is a simple spaceship shooting game based on simple space scenes, comes with distinctive graphics and background music. One interesting thing that differs it from a lot of space shooting games is that, in Radial+, direct firing at enemies is invalid, you have to rely on the reflection of the bullets to hit the enemy ships. Plus, the fire power will become more heavy if the bullets get more reflections! I think this should be the origin of the name of this small game.

Tank Domination is a barrage (danmaku) type of small and free tank STG game developed by ASTRO PORT from Japan in 2006. It comes with omni-directional operation and very high game difficulty (a total of 4 difficulty levels for choice), and 13 stages for each difficulty. Its gaming difficulty is not only reflected in the way of the enemies' attack, also lies in that the author did not set a weapon upgrades system or a props system for the game.

Every senior game players should remember the classic DOS game in those days - Wolfenstein 3D (released in 1992), which is probably the first FPS game you came into contact with (the ancestor of all FPS games that came out even earlier than DOOM, for example: Quake series, Unreal series). I do believe that a number of players just started to like FPS games affected by this game.