Ok, found the game:
Confederate
July 1, "At the start" - Heth, Chambersburg Pike
7 am - Pender, Chambersburg Pike
8 am - Rodes, Carlisle Road
noon - Early, Harrisburg Road
1 pm - Anderson, Chambersburg Pike
3 pm - Johnson, Carlisle Road
5 pm - Hood and McLaws, Chambersburg Pike
July 2
10 am - Pickett, Chambersburg Pike
noon - Hampton, F. Lee, WHF Lee, Jenkins, Carlisle Road
2 pm - Imboden, Robertson, Jones, Chambersburg Pike
Union
July 1, "At the Start" - Gamble and Devin. Wadsworth, Robinson and Rowley, Emmitsburg Road
8 am - Von Steinwehr, Schurz, Taneytown Road. Barlow, Emmitsburg Road
2 pm - Williams and Geary, Baltimore Pike. Birney, Emmitsburg Road
6 pm - Caldwell, Gibbon and Hays, Taneytown Road. Humphreys, Emmitsburg Road
7 pm - Artillery Reserve brigades, Taneytown Road. Barnes, Ayres and Crawford, Baltimore Pike
July 2
9 am - Custer, Farnsworth, McIntosh, Gregg, Huey, Hanover or Baltimore Pike
noon - Wright, Howe and Wheaton, Baltimore Pike
July 3
8 am - Merritt, Emmitsburg Road