OpenTyrian is an Android game that is a port of the classic DOS game Tyrian. It is an arcade-style vertical scrolling shooter that consists of 4 full episodes, ship upgrades, a storyline, powerful enemies, and a lot of action. The game is completely free and does not contain any ads or in-app purchases.

OpenTyrian is a classic game that has been brought to the mobile platform. The gameplay is smooth and the controls are easy to use. The game offers a lot of replay value as there are different difficulty levels to choose from and ship upgrades to unlock. The graphics and sound effects are reminiscent of the classic arcade games of the 90s.

In conclusion, OpenTyrian is a great game for those who enjoy classic arcade-style games. It is completely free and offers a lot of content without any ads or in-app purchases. The game is easy to play and has a lot of replay value. If you are a fan of vertical scrolling shooters, then OpenTyrian is definitely worth checking out.