æz dɪvˈɛləpɪŋ hˈæflˈaɪf tˈuː ænd ðɪ ɚɹˈɪdʒɪnəl sˈoːɹs ˈɛndʒɪn sˌaɪməltˈeɪniəsli hæd kɹiːˈeɪɾᵻd pɹˈɑːbləmz, vˈælv dᵻlˈeɪd dɪvˈɛləpmənt əvə nˈuː hˈæflˈaɪf ʌntˈɪl sˈoːɹs tˈuː wʌz kəmplˈiːt.
As developing Half-Life 2 and the original Source engine simultaneously had created problems, Valve delayed development of a new Half-Life until Source 2 was complete.