You’re Done solution
by Kegler

Per GAME OVER at 25 Across, the eleven answers that are names of games (shown below in red) are inverted in the grid.

You’re Done solution grid

Across
1T + WIS(T)ER
7DO + LED
11E(LIT)E
12KILl + N
13M(OUSETR)AP (ROUTES anag)
14P + UP
15M(ONO + POL)Y
16POINTY (hidden)
18G(RAY)ER
20fERNS
22F + ON + DUE
25GAME OVER
26RAM + P
30R + ADS
31DIPLOMACY (MAD POLICY anag)
32TREY ("TRAY" hom)
34REF + O + RM
37RUST + rICe
38FOES (odd letters)
40OAk + HUt
41RISK (hidden)
42JEU (1st letters)
43BAT + TLES + HIP (LETS anag)
Down
1REAP + PEAR
2TROUBLE (OUR BELT anag)
3TIPPING (2 defs)
4STA(I)N
5WE + T[L/r]Y
6THE + O
7D(ISP)ROVE
8L(I)ON
9ELMO (MOLE anag)
10MAS + TERM + IN + D (SAM rev)
17TOMB + uOY + IS + H (YOU rev)
19J,(lEOPARD)Y
21F(E + T)LOCKS
23NERD (hidden)
24UNDERSEA (ENSURED A anag)
27ACT + U + AL
28MAR + SH
29UPRISE (PERU IS anag)
31SO(RR)Y
33ETU + I (UTE rev)
35LI(F)E
36FOR + T
39DUB (rev)