Atari has officially released the original Roller Coaster simulation games, RollerCoaster Tycoon and RollerCoaster Tycoon 2 for Android and iOS devices.
The 2 games are available in a single app, for a one time fee of Rs. 410 (about $5.99) and Rs. 310 on iOS. However, there are three expansion packs: Wacky Worlds, Time Twister and Toolkit. The expansion packs available as In-App Purchases.
That means, this is a true premium version of the PC game, ported for Android devices. You will need a phone or tablet with a minimum resolution of 960 x 640 to play the game.
The price may seem a bit on the higher side, but consider the content of Roller Coaster Tycoon Classic. It has a total of 95 classic park scenarios from RollerCoaster Tycoon and RollerCoaster Tycoon 2. If you want to play more scenarios, get the Wack Worlds and Time Twister expansions with a total of 31 scenarios to play.
There are some reports which claim that RCT Classic has some compatibility issues with newer Android phones, so you may want to see if that is fixed before getting the game.