Valve's own Counter Strike: Global Offensive was the most purchased game during Steam's recent PC Summer Sale.
The game was purchased 899,405 times throughout the week, according to Steam Spy, pushing its total Steam sales up to over 14m units.
Despite the 50 per cent discount applied to the game as part of the sale, the title's revenues for the period hit over $6.7m. However, the revenue race had another winner – Sega's Total War: Attila, which sold 489k units and hit revenues of $14.7m
Ark: Survival Evolved was another big winner. It was the fourth best-selling game, shifting 431k units, and enjoyed revenues of $10.7m.
Other big unit sellers included Total War: Shogun 2 (439k), Castle Crashers (418k), Left 4 Dead 2 (396k), Medieval II: Total War (371k), How to Survive (310k), Total War: Rome II (308k) and The Witcher 2 (304k).
In revenue terms the strongest performers included The Witcher 3 ($5.1m), Total War: Rome II ($4.6m), Borderlands: The Pre-Sequel ($2.9m), Cities: Skylines ($2.7m), Elite Dangerous ($2.2m) and Dark Souls II: Scholar of the First Sin ($2.1m).
Total Steam Summer Sales revenues are estimated at $241m. Games in the sale had an average price of $5.69 and the average discount was 66.92 per cent.