Unlimited Attraction and Total Devastation 3 are two SHMUP games by Carlo D’Apostoli. For PC and Android.
EndEffector is a polygonal horizontal japanese shoot em up. This shmup aims to recreate the old arcades style.
From the same author of Dash-da-Dash a new original game. Do you remember Splatterhouse? Here is a Shoot’em up themed on the old classic arcade.
ARCTIC COMBAT is a free to play multiplayer online shooter for the PC platform. It is based on team/clan strategic gameplay involving tactical perks, weapons, and equipment with realistic warzone effects in the modern warfare battlefields. Enjoy various game modes including team deathmatch, search and destroy, domination and more.
You can join the current beta testers and give the game a shot during the Firefall Beta weekends! During these special weekends, players will get unlimited access to the Firefall beta for 48 hours. Each weekend will be themed where players are asked to focus on a particular aspect of the game such as thumping, or Chosen-related events. Test new content as well as stress test the new server infrastructure.
TELETROOPER is a fast-paced flying shooter inspired by the game Starfox 64 with an unashamedly high difficulty level.
UPDATE:According to an user comment below in this page, Ace of Spades is no more free, it is now a commercial game. However there is a free version named Build and Shoot based on the same engine..
Here is the link to Build and Shoot
Ace of Spades is the best bits of Minecraft crossed with the fast-paced shooter gameplay of Team Fortress. Free and runs on any PC.
A Nation of Wind is an RTS/Arena Shooter hybrid. Set in an atmosphere dotted by floating islands, your objective is to colonize and explore the sky surrounding your nations capital. Collect resources and activate Ancient Obelisks to progress; All the while protecting your settlements from monsters using your powerful Airship. Every region is procedurally generated, giving the player new and unique challenges to overcome. Completing an area rewards experience which can be used to purchase upgrades to the various Airship systems, or can be used to upgrade the colony units. Exploring further away from the capital will grant the player greater rewards, and difficulty!