2017 was the biggest ever year for games software, reaching a record £3.56bn in sales, driven by record results in both Digital and Online sales (£1.6bn, +13.4%) and Mobile Games, which achieved revenues over £1bn for the first time (£1.07, +7.8%). Boxed software remains a substantial factor in software sales and reversed recent trends to return a +3.4% increase in sales to £790m.
Top 20 Games (Packaged and Digital Sales)*
01. FIFA 18 (ELECTRONIC ARTS) - 2,696,721 (19.9% digital)
02. CALL OF DUTY: WWII (ACTIVISION BLIZZARD) - 2,442,416 (22.8% digital)
03. GRAND THEFT AUTO V (TAKE 2) - 1,080,022
04. ASSASSIN'S CREED ORIGINS (UBISOFT) - 679,965 (20.4% digital)
05. DESTINY 2 (ACTIVISION BLIZZARD) - 673,551 (38.5% Digital)
06. STAR WARS BATTLEFRONT II (ELECTRONIC ARTS) - 658,814 (21.5% digital)
07. CRASH BANDICOOT N.SANE TRILOGY (ACTIVISION BLIZZARD) - 651,354 (26.5% digital)
08. TOM CLANCY'S GHOST RECON: WILDLANDS (UBISOFT) - 574,889
09. GRAN TURISMO: SPORT (SONY COMPUTER ENT.) - 484,833 (12.4% digital)
10. HORIZON ZERO DAWN (SONY COMPUTER ENT.) - 456,374
11. FIFA 17 (ELECTRONIC ARTS) - 425,778
12. FORZA HORIZON 3 (MICROSOFT) - 400,118
13. CALL OF DUTY: INFINTE WARFARE (ACTIVISION BLIZZARD) - 381,478
14. RESIDENT EVIL 7 (CAPCOM) - 354,247
15. MARIO KART 8 DELUXE (NINTENDO) - 341,531*
16. SUPER MARIO ODYSSEY (NINTENDO) - 339,719*
17. LEGO WORLDS (WARNER BROS.) - 336,676
18. THE LEGEND OF ZELDA: BREATH OF THE WILD (NINTENDO) - 329,013*
19. FORZA MOTORSPORT 7 (MICROSOFT) - 267,981 (21% digital)
20. FALLOUT 4 (BETHESDA) - 223,557
*Nintendo and Bethesda don't provide digital sales numbers (Not that it'd make a difference to the top 10)
(I looked into the numbers and you can assume around a ~25% digital share, on average, for the games above.)