For fans seeking a tough tactical challenge, the sci-fi strategy game Templar Battleforce is currently on sale for £4.99 / $4.99 on iOS.
Clad in heavy armor suits and wielding equally powerful guns and swords, you wade into the infested hulls of vessels to wipe out alien threats in turn-based combat. An extensive skill tree, upgradeable armor, and varied loadouts grant you a wide range of battlefield options.
Every tight spaceship corridor offers a new test in your tactical prowess, mixing up objectives in clever ways and carving its own Gold Award-winning niche amid its Warhammer 40k and X-Com influences.
You can find Templar Battleforce on the App Store.