Police Stories, SWAT series, Door Kickers series, and Rebel Cops are all top-down shooter games in the "player plays the role of a police officer" type. Thereinto, Police Stories is the most mature one, developed by HypeTrain Digital from Cyprus. It looks like a very interesting role-playing journey, has a good sense of substitution, combines real-time action and strategic systems, and has seemingly randomly generated but actually thoughtfully designed levels.

Voxel Tanks is a difficult 3D tank shooting game with retro pixel style and dynamic top-down perspective, developed and published by PigeonDev in 2018, using Unity. It uses voxel graphics and retro chiptune music and sound effects. In this game, players will drive a tank to fight on a map full of enemies, looking for a way out. Everything in front of you is your enemy, and all you have to do is destroy all the enemy tanks before they give you a fatal blow.

Mercenary Kings is a small and very cool indie game developed by Tribute Games from Canada, it lets many side-scrolling retro game hardcore enthusiasts feel gracious. Especially, after hatching by Kickstarter, it was successfully commercialized.

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.

Contra: Evolution (AKA: ??? - ????) is an HD remake of the original classic video game Contra released on NES console in 1987. It was developed by Konami's Shanghai studio and originally published by CocoaChina for cellphone in 2010, then for arcade in 2011. Later, it was ported to Android, iPhone and iPad. And this one is for Windows.