This game is ad free.Solo Defender is a vertical space shooter game where the player clears waves of enemies and mini bosses to free the Janera star system from the Kalae occupiers.A challenging, single life play through provides a casual and fun playing experience as you destroy fleets of enemies from multiple planets and defeat the level bosses to end the enemy spawns. The final boss battle to free the system includes the highest level enemies and a drone spawning Mothership!Solve the Covert Ops puzzle and open a secret level!Earn Gems by destroying enemies and completing levels. Visit the in game garage to use these gems to purchase upgrades for your ship. Gems accumulate across games, but are difficulty specificFeatures:Key BindingEasy/Normal/Hard/Extreme modesMultiple mini boss levelsMajor end bossBonus abilities: Multi shot, Invincibility, Repair, and More…Steam AchievementsGem system for ship upgrades