Replica Island is touted by many as "THE" Android game to have, that is if you haven't got it yet. The game is a free, open source game that's available for Android users. It features retro graphics that will definitely get any old-school fanboy lusting after it. Done in 2D and in the same vein as Megaman and Mario, the game is packed with entertainment and will definitely keep you busy for hours on end. The game was originally released back in March 2010. Now, it has garnered quite a following and has solidified its status as one of the most entertaining games in the Android market. There are 40 levels in the game so make sure to clear up a good portion of your afternoon before playing. Because trust me, this is addictive. Give it a go.