You want big, important games? Boy have we got some stuff for you! Three heavy-hitters on this week's Mobile Monday, games you could play on their own for days and weeks on end. Afterwards, when you emerge with ragged hair and skin that reeks of aged onions, you can thank us for sharing!

SpaceChem Mobile (iPad) - You know SpaceChem, yes? The incredibly challenging (and rewarding) logic/alchemy puzzle game from Zachtronics Industries? Now that you've stopped cheering, you can go grab it for iPad! This heady game challenges you to turn elements into compounds and split compounds down to their basic components, all using a series of commands you place on the grid yourself. Create a series of repeatable, perfectly-timed contraptions to produce the chemicals you need from the elements you're given, then pat yourself on the back after an hour of strenuous work finally produces a workable compound. SpaceChem was brilliant on PC/Mac, and it's just as brilliant on iOS.

Squids (iPhone, iPod Touch) - A completely charming strategy/arcade/RPG game that has the power to hook you from the very first level. At first, all you have to do is pull on each squid's tentacles to send him or her flying in the opposite direction. Crash into things to find treasure, hunt for power-ups, explore ancient temples, battle evil crustaceans and fish, and complete objectives that change depending on the world. Then, take all of your earnings and buy upgrades and items in the shop. Position all of this on top of an interesting story and fantastic underwater artwork and you've got the makings of your next iPhone addiction.

SteamBirds: Survival (universal) - We gushed over the original SteamBirds browser release back in 2010, and we loved SteamBirds: Survival when it hit later that year. The original SteamBirds has been on the iTunes App Store for some time, but now, SteamBirds: Survival is out the door, and it boasts a number of improvements over all previous versions of the game. At its core, Survival is still the same alternate history turn-based strategy game involving planes, Axis and Ally powers, and sweet power-ups. Eight new aircraft have been introduced along with 64 brand new missions to play, with almost that number again in the pipeline to be unveiled soon. Plenty of content, lots in store for the future, and the same fantastic gameplay we've come to expect from the series. Also worth noting: SteamBirds: Survival for iOS was ported in part by Halfbrick Studios, those crazy chaps who brought us Jetpack Joyride.

NOTE: Games noted as 'universal' have been designed for iPod Touch, iPad, and iPhone devices alike. Any game not listed for iPad will work on the system, but native full screen will not be present. Games listed may not be available outside of North America. Prices are subject to change and are therefore unlisted. Please see the individual game pages for purchasing info.