Xbox One will be getting another two indie games in early February, with retro sci-fi styled strategy shooter Fortified now available to pre-order for $14.99 (with 15% off for Xbox Live Gold members) and colourful castle defence game Krinkle Krusher also available to pre-order for $9.99, both set for release soon.In Fortified, you play as one of four 50s pulp sci-fi heroes, battling hordes of hostile robots amid a Cold War era Martian invasion. You'll protect the city by building defensive structures, commanding your army alone or with up to four players. Fortified combines real-time strategy with tower defence and third-person shooter elements.As for Krinkle Krusher, you'll cast elemental spells to defend your colourful kingdom from ravenous creatures called Krinkles, freezing, burning and zapping them into oblivion. Fire walls, ice crowns, mud, energy mines, thunder and tornados will be invaluable against bosses and the different environments you'll face with changing strategies.Fortified will be coming to Xbox One on 3rd February 2016 for $14.99/£11.99 (15% off with Gold), while Krinkle Krusher is out for Xbox One on 5th February for $9.99/£7.99. Click the relevant images below to see more screenshots.