Roberts Space Industries is offering everyone a free trial of Star Citizen until August 19, 2015.
1. Go here
2. Register (enlist) a new account
3. Use coupon code: GAMESCOM2015
4. Download the client to play
G2A: Hustle And Bustle Weekly Sale - 3% Off Coupon: KINGS
GMG: Hot Deals - 20% off voucher: INDIEK-INGSDI-SCOUNT