http://armorgames.com/play/12290/helios-and-the-spartan

A fun hack and slash adventure game mixed with breakout elements.

Zombocalypse - A fast paced survivial shooting game where you hold off zombies approaching from either side.

The Lance - A fun jousting game where you upgrade your equipment between jousts.

Arkandian Revenant is a strategic RPG where you quest to destory the Revenant.

Castaway Island TD is a tower defense game based off of the Castaway Island series of adventure games.  It has a unique take on the TD genre.

Exit path 2 has recently been released. You can play a single player game or choose the multiplayer game mode where you can play against up to 5 other runners.

Kingdom Rush is fantasy tower defense game with many interesting features and gameplay.  A walkthrough can be found at Kingdom Rush Walkthrough.

The Osiris Conflict is a turn based strategy game where you guide your units through various missions.

The Last Stand – Union City came out on Armor Games today.  In this addition to the Last Stand series you gain the ability to wander around and explore the city.  Walkthrough available at The Last Stand – Union City Walkthrough.

Crush the Castle TD - The popular crush the castle series has branched off into a fun tower defense game.  A walkthrough is available at Crush the Castle TD Walkthrough.