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43. Teen Agent
60. Silent Hunter
49. Megarace
49. Strategic Command
Okay, more specifically:

49. Megarace 1+2 (since 3 uses lower case Es).

Beyond that, I haven't got a clue!
Oh, it's the E from Space Quest 3! So, I guess that makes the answer:

49. Space Quest 1+2+3
The forth group of letters is up (Day 4).
76 = Neverwinter Nights
66.Giants: Citizen Cabuto
76 Neverwinter Nights
65. XIII
61. Evil Genius
75. Arx Fatalis
79. Freespace
67. Enclave
62. The Journeyman Project 2: Buried In Time
65. XIII
71. Sanitarium
76. Neverwinter Nights
64. Under A killing Moon
80. Screamer
77. Interstate 76
61. Evil Genius
63. Amerzone
71. Sanitarium
73. Feeble Files
78. Shattered Steel
69. Freespace 2