Game of timing in gas pipeline projects competition: simulation software and generalized equilibrium solutions. Many models of energy market development and decision-making processes take into account the competition between energy suppliers, and the theory of games is an appropriate tool to study these problems. This paper is devoted to numerical analysis and modification of the game-theoretical gas market model developed in [G. Klaassen et al., J. Optimization Theory Appl. 120, No. 1, 147–179 (2004; Zbl 1064.91028)]. We describe a software G-TIME elaborated for this purpose, results of simulation and sensitivity analysis on the data of Turkish gas market. The last section deals with a notion of generalized Nash equilibrium which seems to be useful to take risk and uncertainty into account.